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C3 3.6 Alcohols ,carboxylic acids & Esters Version 2.0 Copyright © AQA and its licensors. All rights reserved. Using Exam pro items to support successful outcomes • C3 3.6 • Learners will be able to test their progress against learning outcomes using questions from past AQA GCSE examinations Version 2.0 Copyright © AQA and its licensors. All rights reserved. Foundation Tier QSP 3F 05 • The structures shown are of the first two members of a homologous series of organic compounds. Methanol (a) (i) Ethanol Complete the diagram for propanol, the next member of the homologous series. C―C―C Propanol (1) Version 2.0 Copyright © AQA and its licensors. All rights reserved. C3 3.6 • (ii) Which one of the statements about ethanol is correct? Tick ( ) one box. Statement Tick ( ) Ethanol dissolves in water to form a neutral solution. Ethanol reacts with sodium to produce chlorine. Ethanol does not burn in air. (1) (b) Ethanoic acid (CH3COOH) can be produced from ethanol (CH3CH2OH). (i) What type of reaction happens when ethanoic acid is produced from ethanol? ............................................................................................................... (1) (ii) State one use of ethanoic acid. ............................................................................................................... (1) (Total 4 marks) Version 2.0 Copyright © AQA and its licensors. All rights reserved. C3 3.6 Mark scheme- Foundation Q1 (a) (i) (a) (ii) (b) (b) (ii) Answer Mark Extra Information 1 7 C-H bonds and 1 C-O-H bond 1 ethanol dissolves in water to form a neutral solution oxidation 1 any one from: • in vinegar • to make esters 1 Total Version 2.0 Copyright © AQA and its licensors. All rights reserved. 4 Higher Tier QSP 3H 04 • The structures shown are of the first three members of a homologous series of alcohols. (a) (i) Draw a ring around the correct general formula for alcohols. CnH2n+1OH C2nH2n+1OH CnH2n+2OH (1) (ii) What is the formula of the functional group for alcohols? ............................................................................................................... (1) Version 2.0 Copyright © AQA and its licensors. All rights reserved. C3 3.6 • (b) Ethanol is the alcohol used in alcoholic drinks. (i) When ethanol dissolves in water the solution formed is not alkaline. Tick ( ) the reason why the solution formed is not alkaline. Reason Tick ( ) Ethanol can be used as a solvent. Ethanol dissolves in water to form hydroxide ions. Ethanol has only covalent bonds in its molecule. (1) (ii) Ethanol is used as a fuel because ethanol burns in oxygen. Complete and balance the chemical equation for this reaction. C2H5OH + ................O2 → 2 CO2 + ................ (2) Version 2.0 Copyright © AQA and its licensors. All rights reserved. C3 3.6 • (c) Ethanol can be oxidised to produce the compound shown. (i) Draw a ring around the correct answer to complete the sentence. acidic. When this compound dissolves in water, the solution formed is alkaline. neutral. (1) (ii) Ethanol reacts with this compound to produce the organic compound shown. C2H5OH + CH3COOH → CH3COOC2H5 + H2O Complete the sentence. The type of organic compound produced is ......................................... . (1) (Total 7 marks Version 2.0 Copyright © AQA and its licensors. All rights reserved. C3 3.6 Mark scheme- Higher Q1 (a)(i) Answer • Extra Information CnH2n+1OH C3 3.6 Mark 1 (a)(ii) OH 1 (b) (i) ethanol has only covalent bonds in its molecule 1 (b) (ii) 3 (O2) 1 3H2O 1 (c) (i) acidic 1 (c) (ii) And ester 1 Total 7 Version 2.0 Copyright © AQA and its licensors. All rights reserved. • C3 3.6