Step 1: In the input field, enter the required values or functions. H+(aq) + Cl-(aq) + Na+(aq) + OH-(aq) Na+(aq) + Cl-(aq) + H2O(l). Check that all the formulae in the equation are correct. bbc bitesize Ionic compounds. Example: Write a balanced ionic equation for the reaction in which sulfuric acid is neutralised by potassium hydroxide. 'BBC GCSE Bitesize Neutralisation May 8th, 2018 - HCl NaOH ' NaCl H 2 O This is the ionic equation that represents the neutralisation reaction between any acid and any alkali'' Determine The Enthalpy Of Neutralization For HCl NaOH May 5th, 2018 - Determine The Enthalpy Of Neutralization Sodium chloride and concentrated sulphuric acid. NaCl (aq) + AgNO 3 (aq) AgCl (s) + NaNO 3 (aq) Step 2: Split the ions. Carbonates are carbon atoms attached to Neutralisation: A Reaction in which Acidity or Alkalinity is removed. The other ions that dont participate are called spectator ions. Thus, we need to neutralize their toxicity before they can be thrown out. \[\ce{HNO_2} \left( aq \right) + \ce{KOH} \left( aq \right) \rightarrow \ce{KNO_2} \left( aq \right) + \ce{H_2O} \left( l \right)\nonumber \]. Second, we write the states and break the soluble ionic compounds into their ions (these are the strong electrolytes with an (aq) after them). Legal. Ionic equations are chemical equations that show only ions that participate in a chemical reaction. A salt is an ionic compound composed of a cation from a base and an anion from an acid. This page will be removed in future. There are two different types of ionic equations: Neutralisation Displacement Neutralisation When an acid reacts with an alkali, the acid's hydrogen ions react with the alkali's hydroxide. BBC GCSE Bitesize Reactions of acids. For the neutralisation of acidic soils, farmers use lime (calcium oxide). Redox reactions are therefore two-part reactions, and its possible to split the overall chemical equation representing a redox reaction into two chemical equations, one of the reduction, one for the oxidation. Steps in writing a net ionic equation -Write the balanced molecular equation. What is the definition of a neutralisation reaction. . Neutralization Reaction Acid-Base Reaction to form Salt and Water. Since oxidation is loss, the electrons go on the RHS: Answer to worksheet on writing ionic equations. Title: Verify that you are not a robot Author: Google Inc. Subject: Verify that you are not a robot Created Date: 20200215203600Z Sodium ions gain electrons ( reduction) to form sodium atoms. The aqueous sodium chloride that is produced in the reaction is called a salt. Pouring concrete and working it are messy jobs. The balanced molecular equation now involves a 1:2 ratio between acid and base. The chemical equation for the neutralization of sulfuric acid and sodium hydroxide can be written as H 2 SO 4 + 2NaOH > 2H 2 O + 2NaSO 4. hydrochloric acid hcl pubchem. This is the reaction that always occurs when an acid + alkali salt + water. Neutralisation is the reaction between an acid and a base. the acidic reactions of Acids react with metals, bases and carbonates to produce salts. 3. Example: Wtite a balanced net ionic equation for the reaction in which sulfuric acid is neutralised by potassium hydroxide. Professional Home Measurement Nashville, acid and sodium Spectator ions are not shown in an ionic equation. This uses the scientific names for the acid and alkali placed on the reactant side of the equation. Use uppercase for the first character in the element and lowercase for the second character. 2018 - this page has a quick look at enthalpy changes of neutralisation the full equation for the reaction between hydrochloric acid and sodium hydroxide solution is''The "reaction of sodium hydroxide with . Where To Buy Columbine Seeds, Finally, we cross out any spectator ions. (Opens a modal) Titration of a strong acid with a strong base (continued) (Opens a modal) Titration of a weak acid with a strong base. + OH-(aq) No ads = no money for us = no free stuff for you! This is the balanced chemical . Synthesis Isolation and Purification of an Ester. Write out the resulting ionic equation: Mg (s) + Pb 2+(aq) Mg 2+(aq) + Pb (s) Now, write the half-equation for the reduction reaction. (adsbygoogle = window.adsbygoogle || []).push({}); Want chemistry games, drills, tests and more? Is The Reaction Between NaOH And HCl Exothermic Or. Both of these salts will dissociate into ions. In a molecular equation, all the species are represented as molecules, even the compounds that exist only as ions in the solution. Neutralization reaction occurs when an acid and a base react with each other to form salt and water. Write the ionic equation for this neutralisation reaction. Very good explanation and examples, excellent. With very few exceptions, a substance in aqueous solution will be ionised, because the process of dissolving usually requires ionisation. Thank you so much! Neutralization reactions are one type of chemical reaction that proceeds even if one reactant is not in the aqueous phase. HI + NaOH ( H2O + NaI. It turns a deep pink colour. An alkali has a pH of more than 7.. An acid is neutralised when it reacts with an alkali, a base a carbonate or a metal. neutralization chemistry libretexts. This is called an ionic equation. The net ionic equation is commonly used in acid-base neutralization reactions, double displacement reactions, and redox reactions. When food is moved between our stomach and intestines, the food needs to be neutralized. Sodium chloride (aq) + silver nitrate (aq) silver chloride (s) + sodium nitrate (aq) Solution: Step 1: Write the equation and balance it if necessary. What is the general ionic equation for neutralisation? The name redox is derived from the fact that two reactions occur simultaneously, areduction and anoxidation. Step 2: For output, press the "Submit or Solve" button. inorganic chemistry qualitative analysis tests for anions. \[\ce{HNO_2} \left( aq \right) + \ce{K^+} \left( aq \right) + \ce{OH^-} \left( aq \right) \rightarrow \ce{K^+} \left( aq \right) + \ce{NO_2^-} \left( aq \right) + \ce{H_2O} \left( l \right)\nonumber \]. So in this case H 2 SO 4 (aq) and Ba (OH) 2 (aq) must be . One practical way to neutralize the basic pH is to bubble \(\ce{CO_2}\) into the water. BBC GCSE Bitesize Reactions of acids. Gravity. [] We can now write two ionic half-equations to reflect the oxidation state changes. It is easiest to see this with ionic equations: For the bromine equation, just swap Cl for Br. 1:59 (Triple only) write ionic half-equations representing the reactions at the electrodes during electrolysis and understand why these reactions are classified as oxidation or reduction; . Ions that do not take part in the reaction are referred to as spectator ions. The first steps of the procedure are the same as for writing ionic equations. To treat bee stings and ant bites that are acidic in nature, baking powder is used. For optimal plant growth in any soil, there are certain conditions which are required. The resulting solution is not neutral (pH \(= 7\)), but instead is slightly basic. Example: Writing an Ionic Equation for a Neutralisation Reaction. ; Stage 5. The maximum temperature is. We can write it in terms of ions, They have high melting and boiling points, and conduct electricity when melted or dissolved in water. Bases have a flavour that is bitter or astringent and have a pH greater than 7. In the neutralisation reaction between dilute hydrochloric acid and sodium hydroxide solution, a salt and water are formed. With the help of simple stoichiometric calculations and knowledge of the volume and molarity of the known quantity, the molarity of the unknown particle can be found out. It. For example, we can quite easily identify a familiar substance like NaCl as an ionic compound that ionises to form Na+ and Cl in solution, but what about something like K2S4O6? Molecular equation: H 2 SO 4 (aq) + Ba (OH) 2 (aq) ---> BaSO 4 (s) + 2H 2 O (l) So the molecular form of the equation is shown above. But for nutrients to be absorbed through the intestine walls an alkaline environment is required. This is especially important for precipitation reactions, where solutions are mixed and an insoluble solid forms. The maximum temperature is reached when. To make the cakes grow, baking powder is typically used. Write out the resulting ionic equation: Mg (s) + Pb 2+(aq) Mg 2+(aq) + Pb (s) Now, write the half-equation for the reduction reaction. Weak acids should not be separated into ions in the ionic equation due to partial ionization. Ionic half-equation simply refers to the fact that we simplify the half-equation by only showing the ions that undergo change. This indicates how strong in your memory this concept is, Neutralization Reaction and Net Ionic Equations. Is IB chemistry harder than A Level chemistry? Group 7 25 22-24 Q72-73 1.1.8 BBC Bitesize -Reactivity of group 1 and 7 elements Halogens Properties of transition metals 23 18 Q76-80 1.1.10 The Transition Metals Song Chemical Bonds 28 1 Page 99 2.1 BBC Bitesize Ionic compounds and the periodic table Ionic Bonding 29 2-5 Q20-23 2.1.1 What are ionic bonds? The ionic equation for neutralisation is (higher tier): H + (aq) + OH- (aq) H 2 O (l) Neutralisation is an exothermic reaction - one in which heat is given out. the pH will continue to go down and the solution becomes acidic. We can write the balanced equation for this: To simplify this, the first step is to split up the compounds into ions. Split soluble compounds into ions (the complete ionic equation).4. In other words, the net ionic equation applies to reactions that are strong electrolytes in . what is the enthalpy of neutralization a plus topper. This worksheet will help you practise writing ionic equations for neutralisation and precipitation reactions Where state symbols are not given, youll need to use the solubility rules to determine whether a substance will ionise Write ionic equations for the following: 1. To neutralise the excess acid, antacid tablets contain bases such as magnesium hydroxide and magnesium carbonate. Balanced ionic equations - Higher A balanced ionic equation shows the reacting ions in a chemical reaction. The interesting thing (and useful fact for revision purposes) is that all neutralisation reactions have this same ionic equation. (i) Chlorine gas is (1) A brown B colourless C green D violet (ii) At room temperature, the physical state of bromine is For SQA National 5 Chemistry, learn about the properties of acids and bases and how to tell them apart with this BBC Bitesize Scotland revision guide. 2. A neutralization reaction can be defined as a chemical reaction in which an acid and base quantitatively react together to form a salt and water as products. Ionic substances form giant ionic lattices containing oppositely charged ions. How to create ionic equations for neutralisation, precipitation and redox reactions from word or chemical equations. 3 Ca(OH)2 + 2 H3PO4 ( 6 H2O + Ca3(PO4)2. hydrobromic acid and barium hydroxide. 23 Votes) When a chemical reaction happens, energy is transferred to or from the surroundings. This is the reaction that always occurs when an acid + alkali salt + water. These polyatomic ions are stable in solution compared to the ions youd form if they broke up further. The ionic equation for neutralisation is (higher tier): H + (aq) + OH-(aq) H 2 O(l) Neutralisation is an exothermic reaction one in which heat is given out. an acid + 21.7 Lewis Acids and Bases . Neutralisation Reactions . ionic equation for neutralisation bbc bitesize . ions (Cl-(aq)), and sodium ions (Na+(aq)) appear on Similarly, the reaction between tin and lead chloride may be written as Chemical reactions occurring in aqueous solution are more accurately represented with a net ionic equation. When equal amounts of a strong acid such as hydrochloric acid are mixed with a strong base such as sodium hydroxide, the result is a neutral solution. Iodine isn't a strong enough oxidising agent to oxidise iron(II) ions, so there is no reaction. uses for neutralisation, carbon dioxide formation and salt production . reactions of acids with bases bbc. The reaction between weak nitrous acid and strong potassium hydroxide is shown below. NaHCO3 is Sodium bicarbonate, common name baking soda, is a slightly basic Salt. Example: Writing an Ionic Equation for a Neutralisation Reaction. hydrogen most neutralisation reactions. What is the method for titration?Watch to find out more!Catering for IGCSE and SPM students. Methods of making salts and chemical tests for salts. involving halide ions and sulphuric acid. alkali What Happens When You Mix Calcium Hydroxide And. What is the method for titration?Watch to find out more!Catering for IGCSE and SPM . Your Mobile number and Email id will not be published. You are here: interview questions aurora; . Fortunately, we have a state symbol and a set of rules to help determine which substances do and dont ionise. The molecular and net ionic equations for the reaction of hydrochloric acid and ammonia are shown below. Example: Write a balanced molecular equation for the reaction in which sodium hydroxide is neutralised by hydrochloric acid. Lastly, dont ionise solids or gases present as reactants or products in chemical reactions, and dont ionise liquids unless its a molten ionic compound. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. 2 Na + + 2 e - 2 Na ( sodium metal at the ( -) cathode ). To better organize out content, we have unpublished this concept. Electrolysis. Whilst sulfuric acid (H2SO4) ionises to form sulfate ions (SO42-), you cant ionise sulfate ions any further. These equations can be used to model what happens in precipitation reactions . For example, dilute ethanoic acid reacts with magnesium. both sides of the A substance being split up by the action of water means it has formed a solution in water it has dissolved. Practice. Since the acid and base are both strong, they are fully ionized and so are written as ions, as is the \(\ce{NaCl}\) formed as a product. ionic equation for neutralisation bbc bitesize. Depending upon the strength of the constituent acids and bases the pH of the products varies. Custom solutions that exceed your expectations for functionality and beauty. Water does ionise in solution, forming H+ and OH ions, but as youll discover post-GCSE, its ionisation is negligible compared to other ionic substances. The strong hydroxide ion essentially "forces" the weak nitrous acid to become ionized. Neutralization reactions are used in industry when there is leakage of an acid or a base, since each in its concentrated state is a corrosive substance, dangerous for a human being to have contact with it. When an Arrhenius acid is added to an Arrhenius base, we say that the acid will neutralise the base. A weak base is used to neutralise acids. Hes put together these handy revision notes to match the Edexcel IGCSE Chemistry specification so you can learn exactly what you need to know for your exams. April 30th, 2018 - Start Studying Acids And Bases Chemistry Learn Vocabulary Give The Ionic Equation With State Symbols For A Neutralization . These equations assume that the salt formed is soluble in water. hydroxide form ions in water. WILL NEED TO BE ABLE TO WRITE THE IONIC AND NET IONIC EQUATIONS FOR THESE REACTIONS''Neutralization Reaction Acids Bases Elmhurst College April 25th, 2018 - The Word Neutralization Is Used The Following Are Some . bbc gcse bitesize exothermic reactions. An acid has a pH of less than 7. Basic solutions contain aqueous hydroxide ions, OH (aq). All neutralization reactions of a strong acid with a strong base simplify to the net ionic reaction of hydrogen ion combining with hydroxide ion to produce water. 1. In the reaction between Neutralisation reactions A neutralisation reaction is a reaction between an acid and a base. It is called the ionic equation for neutralisation. The result which is often called the net ionic equation shows that in this neutralisation reaction, all that really happens is a H+ ion reacts with a OH ion to form water. I will be using this in my class. (a) Put a cross in the box to indicate your answer. When an acid is added to an alkali, the pH of the mixture falls as the acid reacts with it forming a neutral solution. \[\ce{H_2SO_4} \left( aq \right) + 2 \ce{NaOH} \left( aq \right) \rightarrow \ce{Na_2SO_4} \left( aq \right) + \ce{H_2O} \left( l \right)\nonumber \]. Neutralisation. Neutralisation is the reaction between an acid and a base. The sodium sulfate salt is soluble, and so the net ionic reaction is again the same. The word equation for neutralization is acid + base = salt + water. You only need to model how the solid silver chloride forms: Ag + (aq) + Cl-(aq) AgCl(s). To write the ionic equation we must separate all aqueous species into their ions and leave any solid, liquid or gaseous substance in its molecular form. Chemical Calculations 1. to 16. sections of explanation-examples and quizzes built into the notes. Neutralisation Quiz This worksheet will help you practise writing ionic equations for neutralisation and precipitation reactions Where state symbols are not given, you'll need to use the solubility rulesto determine whether a substance will ionise Write ionic equations for the following: 1. Methods of making salts and chemical tests for salts. The products of the reaction do not have the characteristics of either an acid or a base. involves substances that form ions BBC GCSE Bitesize Neutralisation Reactions. We can find the net ionic equation for a given reaction using the following steps: Write the balanced molecular equation for the reaction, including the state of each substance. Al(s) + Fe3+(aq) + 3NO3(aq) Al3+(aq) + 3NO3(aq) + Fe(s), Cancel ions that appear on both sides of the equation. Index To learn more about the different types of chemical reactions like decomposition reaction and more, register with BYJUS. ionic: H+ (aq) + Cl - (aq) + K + (aq) + OH - (aq) K+ (aq) + Cl- (aq) + H 2 O (l) net ionic: H+ (aq) + OH - (aq) H 2 O (l) 3. Chemistry BBC Bitesize 1b 5.2 Acids, bases and salts Preparation for practical exam Acidic, alkaline and neutral substances. In order for the reaction to be a full neutralization, twice as many moles of NaOH must react with the H 2 SO 4. Test Your Knowledge On Neutralization Reaction! It is called the ionic equation for neutralisation. How is neutralisation carried out experimentally? Acids and Bases on BBC Bitesize (National 5) basically the better version of this . For example, the chemical reaction between HCl(aq) and Fe(OH) 3 (s) still proceeds according to the equation 3 HCl(aq) + Fe(OH) 3 (s) 3 H 2 O() + FeCl 3 (aq) even though Fe(OH) 3 is not soluble. an acid + alkali salt + water. Lead changes oxidation state from +2 to 0, so it is the element getting reduced. First of all, split the soluble aqueous compounds into ions: Mg(s) + Pb2+(aq) + 2NO3(aq) Mg2+(aq) + 2NO3(aq) + Pb(s). 2 Cl - - 2 e - Cl 2 ( chlorine gas at the ( +) anode ). The full ionic equation for the neutralization of hydrochloric acid by sodium hydroxide is written as follows: \[\ce{H^+} \left( aq \right) + \ce{Cl^-} \left( aq \right) + \ce{Na^+} \left( aq \right) + \ce{OH^-} \left( aq \right) \rightarrow \ce{Na^+} \left( aq \right) + \ce{Cl^-} \left( aq \right) + \ce{H_2O} \left( l \right)\nonumber \]. H2O(l). Neutralisation Reaction Experiments Gcse pdf Free Download Here www chemactive Chemistry Resources for IB AP Alevel' 'bbc gcse bitesize exothermic reactions april 28th, 2018 - a secondary school revision resource for aqa gcse additional science about chemical reactions 31 / 54 Science Period 7 Monday 3-4pm BBC Bitesize Science revision neutralisation, indicator, concentration, electrolysis, electrolyte, cathode, anode. dissolving and neutralisation; 3:05 (Triple only) draw and explain energy level diagrams to represent exothermic and endothermic reactions; 3:06 (Triple . The two half-equations combined give the overall equation. Formation of Sodium Chloride (Common Salt). Acids and Alkalis. Revision Questions, gcsescience.com investigating a neutralisation reaction between. The ionic equation for neutralisation is (higher tier): H + (aq) + OH- (aq) H 2 O (l) Neutralisation is an exothermic reaction - one in which heat is given out.                , Neutralisation (or neutralization) was defined by Arrhenius as a reaction in which hydrogen ions (H, The neutralisation reaction (or neutralization reaction) takes place when an. Al(s) + Fe(NO3)3(aq) Al(NO3)3(aq) + Fe(s), Identify the soluble compounds using the solubility rules or the aqueous state symbol. Which substances ionise in ionic equations? . hydroxide ion Off-the-job Training Method Consists Of, Copyright 2015 gcsescience.com. by writing a simple ionic equation: H+ (aq) + OH-(aq) H 2 O (l) Water is formed. Put your understanding of this concept to test by answering a few MCQs. This leaves the ionic equation. Fe (s) + Cu 2+ (aq) Fe 2+ (aq) + Cu (s) This is the ionic equation for the reaction between iron and copper(II) sulfate. Study with Quizlet and memorize flashcards containing terms like What colour does litmus solution turn in an alkali?, Phenolphthalein solution is added to a colourless liquid. Fe(NO3)3 is a nitrate, so will be soluble, as will Al(NO3)3. Step-by-step guide to understanding and writing ionic equations. The half equations are. The method of chemical titration is employed to find unknown concentrations of acids or bases by finding their neutralization point. the equation showing only the ions. 'Preparing Salts By Neutralisation Of Oxides And Carbonates April 15th, 2018 - Preparing Salts By Neutralisation Of Oxides . Term. Enthalpy changes of neutralisation are always negative - heat is given out when an acid and and alkali react. The stars of our reactions were acids, or substances with a pH of less than 7. Florida Blazers Roster, In an ionic equation, species that exist as ions in solution are shown as ions, and species that exist as molecules in the solution are shown as molecules. These are the spectator ions. hydrochloric acid and sodium hydroxide nacl h 2 o this is the ionic equation that represents the neutralisation reaction between any acid and any alkali' C5d Titrations. This is very useful, particularly when dealing with redox reactions which are complicated enough without spectator ions getting in the way. Oops, looks like cookies are disabled on your browser. To treat wasp stings that are alkaline in nature, vinegar is used. A neutralization reaction is a reaction in which an acid and a base react in an aqueous solution to produce a salt and water. It is possible that the salt formed is not soluble in water, in which case the equation would be written as for a precipitation reaction. The balanced molecular equation is: \[\ce{HCl} \left( aq \right) + \ce{NaOH} \left( aq \right) \rightarrow \ce{NaCl} \left( aq \right) + \ce{H_2O} \left( l \right)\nonumber \]. Discover support designed to help you and your colleagues deliver high-quality, engaging chemistry lessons within a supportive science department. 5 PiXL Independence Level 2 5 questions, 5 sentences, 5 words GCSE Chemistry Chemical changes INSTRUCTIONS For each statement, use either the suggested website or your own text book to write a 5-point summary. (compare this reaction with the ionisation of water). 2. salt + water. Notify me of follow-up comments by email. (1) 2. Write the balanced molecular equation.2. Test. Report this resource to let us know if it violates our terms and conditions. The reaction between an acid and a base that forms water and salt is neutralisation. for Neutralisation? How is neutralisation carried out experimentally? More Online Free Calculator. Reactions where at least one of the components is weak do not generally result in a neutral solution. The purpose of ionic equations is they simplify chemical equations by eliminating the species that arent undergoing any change. What are acids and bases? occurs Skee Ball Instagram Captions, Exothermic Or Endothermic The Royal Society Of Chemistry. 1 -H Spec point Concepts CGP revision guide pages Bitesize YouTube 4.2.2 How bonding and structure are related to the properties of a substance -interpreting melting and boiling point data The pH of the alkaline solution will decrease. Defines neutralization reaction and gives full and net ionic equations for neutralization reactions of both strong and weak acids and bases. An alkali has a pH of more than 7.. An acid is neutralised when it reacts with an alkali, a base a carbonate or a metal. BBC Bitesize Science revision checklists in DMA Revision area W/B 23/9 half equation, ionic equation, acid, salt. \[\begin{align*} &\ce{HCl} \left( aq \right) + \ce{NH_3} \left( aq \right) \rightarrow \ce{NH_4Cl} \left( aq \right) \\ &\ce{H^+} \left( aq \right) + \ce{NH_3} \left( aq \right) \rightarrow \ce{NH_4^+} \left( aq \right) \: \: \: \: \: \: \: \: \: \: \left( \ce{Cl^-} \: \text{is a spectator ion} \right) \end{align*}\nonumber \]. You can swap Na + for any cation and Cl for any anion and the ionic equation for neutralisation will still be H + + OH > H 2 O MEMORY METER. alkali combine to form a water Acids Common properties Acids . Similarly, you wouldnt ionise nitrate ions (NO3), carbonate ions (CO32-), phosphate ions (PO43-) and ions like chlorate(I) (ClO) and iodate(V) (IO3). NaOH S Aq O English Montreal School Board. What does this tell you?, Which of these might have a pH of 9? This is an ionic substance so in water it breaks apart into ions H^+ + Cl_- Potassium Hydroxide is also an ionic substance it also breaks apart in water into ions K^+ + OH^- So the complete ionic equation for the reaction is H^+ + Cl^- + K^+ + OH^- = K^+ + Cl^- + H_2O The Hydrogen ion and the Hydroxide ions Give the name of two substances that act as bases to neutralise an acid. Some examples of materials mixed in the soil to neutralize it from acidity are: A neutral ionic compound is a salt. reaction Please enable javascript and pop-ups to view all page content. For example, an equation showing hydrochloric acid being neutralised by sodium hydroxide: \ [HCl + NaOH \to NaCl + H_2^ {}O\] The ionic equation. (see the next page). Indicators are used to determine whether a solution is acidic or alkaline. Na+ and Cl dont play any role in the reaction whatsoever. page), HCl(aq) Salts made from an Acid and a Base.. Metal oxides are bases.A base will neutralise an acid. Chemical reactions occurring in aqueous solution are more accurately represented with a net ionic equation. Temperature: 450C. What is the use of neutralization? ; The limiting reagent is the reactant which is not present in excess in a reaction. NaCl(aq) The diagram below helps to visualise this process. If a substance has the state symbol aqueous in a chemical equation, it means that the substance is soluble and will usually be ionised. Bitesize YouTube 5.4.1 The Reactivity of Metals-Metals + oxygen-Reduction and oxidation in terms of oxygen-reduction and oxidation in terms of electrons-identify in a given reaction, symbol equation or half equation which species are oxidised and which are reduced-The Reactivity Series -Displacement reactions-Extraction of metals by reduction For sqa national 5 chemistry, learn about the properties of acids and bases and how to tell them apart with this bbc bitesize scotland revision guide. How much acid is needed to neutralise an alkali? neutralization reaction.