For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ The haracteristic Properties of cids and ases Question Paper Level Subject Exam oard Topic Sub-Topic ooklet O Level hemistry ambridge International Examinations The hemistry and Uses of cids, ases nd Salts The characteristic Properties of cids and ases Question Paper Time llowed: 56 minutes Score: /47 Percentage: /100
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ 1 Which oxide is amphoteric? l 2O 3 O 2 Na 2 O SO 2 2 The ph of an aqueous solution of hydrochloric acid is 2. What will be the ph of the acid after the addition of 10 g of sodium chloride? 1 2 7 9 3 Which row correctly describes the oxides? 4 Which pair of substances reacts to form a salt and water only? aqueous sodium chloride and aqueous silver nitrate aqueous sodium hydroxide and dilute ethanoic acid aqueous sodium carbonate and dilute sulfuric acid zinc and dilute hydrochloric acid 5 Which reaction does not involve neutralisation? H 2 SO 4 (aq) + 2NH 3 (aq) (NH 4 ) 2 SO 4 (aq) H 2 SO 4 (aq) + al 2(aq) aso 4 (s) + 2Hl (aq) H 2 SO 4 (aq) + uo(s) uso 4 (aq) + H 2 O(l) H 2 SO 4 (aq) + 2NaOH(aq) Na 2 SO 4 (aq) + 2H 2 O(l)
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ 6 Which solution containing one mole per dm 3 of the compound would have the lowest ph? ethanoic acid hydrochloric acid sodium chloride sodium hydrogencarbonate 7 Which statement about oxides is correct? basic oxide is an oxide of a non-metal. cidic oxides contain ionic bonds. n amphoteric oxide contains a metal. asic oxides are always gases. 8 Which statement about amphoteric oxides is not correct? They dissolve in water. They are formed only by metals. They react with aqueous sodium hydroxide to give salts. They react with aqueous acids to give salts. 9 The sentence describes two metals and their oxides. Metal X could be copper because its oxide is 1 and metal Y could be 2 because its oxide is amphoteric. Which words correctly complete gaps 1 and 2?
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ 10 When the product of a reaction between two gases is added to water, a solution of ph7 is formed. Which could be these gases? hydrogen and chlorine hydrogen and nitrogen hydrogen and oxygen oxygen and carbon monoxide 11 sample of air was bubbled into water. The ph of the water slowly changed from 7 to 6. Which gas in the sample caused this change? carbon dioxide carbon monoxide nitrogen oxygen 12 Which reaction occurring in the blast furnace is an acid base reaction? + O 2 2O + O 2 O 2 ao + SiO 2 asio 3 Fe 2 O 3 + 3O 2Fe + 3O 2 13 What is a property of the hydroxide, OH, ion? It combines with hydrogen to form water. It is present in water. It readily breaks down into hydrogen ions and oxide ions. It travels to the cathode in electrolysis of an aqueous solution.
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ 14 The diagram shows some reactions of copper compounds. Which change is made by adding an acid? malachite uo 3 copper(ii) sulfate uso 4 copper(ii) oxide uo copper u 15 Which calcium compound does not increase the ph of acidic soils? calcium carbonate calcium hydroxide calcium oxide calcium sulfate 16 n excess of calcium hydroxide is added to an acidic soil. What happens to the ph of the soil?
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ 17 Which substances react together to give hydrogen? calcium oxide and water copper and dilute sulfuric acid copper and steam magnesium and steam 18 n alloy of copper and zinc is added to an excess of dilute hydrochloric acid. Which observations are correct? residue grey none none red-brown filtrate blue solution blue solution colourless solution colourless solution
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ 19 The diagram shows apparatus for measuring the volume of hydrogen given off when an excess of dilute hydrochloric acid is added to powdered metal. The volume of gas is measured at room temperature and pressure. dilute hydrochloric acid tap graduated tube metallic powder water The experiment is carried out three times, using the same mass of powder each time but with different powders: pure magnesium pure zinc a mixture of magnesium and zinc Which powder gives the greatest volume of hydrogen and which the least volume?
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ 20 Sodium hydroxide solution was added to dilute hydrochloric acid. The ph of the solution in the flask was measured at intervals until no further change of ph took place. sodium hydroxide solution hydrochloric acid What would be the ph change in this reaction? decrease to 1 decrease to 7 increase to 7 increase to 12 21 Which mixture would react with dilute sulfuric acid to form two different gases? copper and magnesium carbonate copper(ii) carbonate and magnesium copper(ii) carbonate and magnesium oxide copper(ii) oxide and magnesium 22 Which compound in a 1 mol / dm 3 solution has the lowest ph value? ethanoic acid hydrogen chloride sodium chloride sodium hydroxide
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ 23 Which equation represents the reaction between hydrochloric acid and sodium hydroxide? l + Na + Nal + 2H + O 2 H 2 O 1 O 2 2 + H 2 H 2 O + H + OH H 2 O 24 The following statements about dilute sulphuric acid are all correct. 1 2 3 4 white precipitate is formed when aqueous barium chloride is added. The solution turns anhydrous copper(ii) sulphate from white to blue. ddition of Universal Indicator shows that the solution has a ph value of less than 7.0. The solution reacts with copper(ii) oxide, forming a blue solution. Which two statements confirm the acidic nature of the solution? 1 and 2 1 and 3 2 and 4 3 and 4 25 Which element will burn in oxygen to form an acidic oxide? calcium carbon iron magnesium 26 ifferent solids were added to separate portions of warm dilute sulphuric acid. For which solid is the observation correct? solid ammonium sulphate copper magnesium oxide zinc carbonate observation alkaline gas produced gas evolved ignited with a pop solid dissolved with no effervescence gas evolved relights glowing splint
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ 27 One mole of compound X gives three moles of ions in aqueous solution. X reacts with ammonium carbonate to give an acidic gas. What is compound X? calcium hydroxide ethanoic acid sodium hydroxide sulphuric acid 28 Why is ethanoic acid described as a weak acid? It is only slightly ionised in water. It is a poor conductor of electricity. It is an organic acid. It reacts only with very reactive metals. 29 Which pair of substances produce a precipitate when their aqueous solutions are mixed? barium nitrate, silver nitrate sodium chloride, barium nitrate sodium nitrate, barium chloride sodium sulphate, barium chloride 30 Sodium, aluminium and sulphur are in the same period of the Periodic Table. Which trend in types of oxide occurs across this period? left right acidic amphoteric basic amphoteric basic acidic basic acidic amphoteric basic amphoteric acidic
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ 31 Substance X conducts electricity when in the solid state. X reacts with hydrochloric acid. Which substance could X be? copper(ii) oxide silicon(iv) oxide sodium chloride zinc 32 Which of the following is a reaction of dilute sodium hydroxide? It reacts with ammonium chloride to produce ammonia. It reacts with calcium carbonate to produce carbon dioxide. It reacts with copper(ii) oxide to produce water. It reacts with Universal Indicator solution turning it red. 33 Which substance does not produce copper(ii) sulphate when added to dilute sulphuric acid? copper copper(ii) carbonate copper(ii) hydroxide copper(ii) oxide 34 Which ionic equation represents the neutralisation of aqueous sodium hydroxide with dilute nitric acid? + H + OH H 2 O Na + + NO 3 NaNO 3 + Na + HNO 3 NaNO 3 + H + NaOH + H + Na + + H 2 O
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ 35 The diagram shows the colours of the indicators, methyl orange and methyl red, at different ph values. The table shows the ph of four solutions. In which solutions will both indicators be yellow? W and X X and Y Y and Z Z only
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ 36 Which graph shows the changes in ph as an excess of hydrochloric acid is added to aqueous sodium hydroxide? 14 14 ph 7 ph 7 0 volume of acid added 0 volume of acid added 14 14 ph 7 ph 7 0 volume of acid added 0 volume of acid added 37 Which statement does not describe a property of a weak acid in solution? It forms a salt with sodium hydroxide. It has a ph of between 8 and 9. It is only partly dissociated into ions. It reacts with sodium carbonate to give off carbon dioxide.
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ 38 Which products are formed when dilute hydrochloric acid reacts with the substances shown in the table? 39 Which process does not result in the formation of both carbon dioxide and water? addition of a dilute acid to a carbonate burning ethanol burning methane heating crystals of hydrated sodium carbonate 40 The table gives information about three indicators. indicator low ph colour change high ph ph at which colour change takes place methyl orange red yellow 4.0 bromothymol blue yellow blue 6.5 phenolphthalein colourless pink 9.0 If equal volumes of these three indicators were mixed, which colour would be observed at ph 5? blue green orange yellow
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ 41 The table gives information about three indicators. Which colours would be obtained when each indicator was added separately to pure water? 42 From which reaction is a gas produced? adding calcium to water adding dilute hydrochloric acid to silver adding dilute sulphuric acid to copper electrolysing aqueous copper(ii) sulphate, using copper electrodes 43 The following equations represent reactions of dilute sulphuric acid. Which reaction is not typical of a dilute acid? 2KOH(aq) + H 2 SO 4 (aq) K2SO 4(aq) + 2H2O(l) uo(s) + H 2 SO 4 (aq) uso 4(aq) + H2O(l) Pb(NO 3 ) 2 (aq) + H 2 SO 4(aq) PbSO 4(s) + 2HNO 3(aq) ZnO 3 (s) + H 2 SO 4 (aq) ZnSO 4(aq) + O 2(g) + H2O(l)
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ 44 black powder is burned in air. The gas produced dissolves in water to form solution R. The ph of R is close to 7. The gas is readily absorbed in aqueous sodium hydroxide. What type of substance is present in solution R? strong acid strong base weak acid weak base 45 Which reaction will not occur using cold, dilute sulphuric acid? formation of copper(ii) sulphate from copper(ii) oxide formation of copper(ii) sulphate from copper formation of hydrogen from magnesium metal formation of carbon dioxide from sodium carbonate 46 The ph of an aqueous solution of hydrochloric acid is 2. What will be the ph of the acid after the addition of 10 g of sodium chloride? 1 2 7 9
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ 47 luminium sulphate is used in water treatment. queous aluminium sulphate is acidic. The table shows the results of tests on four different samples of treated water. To which sample had an excess of aluminium sulphate been added? sample ph of sample 3 3 7 11 reaction with an excess of aqueous ammonia white precipitate no reaction no reaction white precipitate