AQA GCSE COMBINED SCIENCE: TRILOGY Higher Tier Chemistry Paper 1H 2019 QUESTION PAPER

Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature GCSE COMBINED SCIENCE: TRILOGY Higher Tier Chemistry Paper 1H H ayati 2 *02* IB/M/Jun19/8464/C/1H 0 1 This question is about reactions of metals. Figure 1 shows what happens when calcium, copper, magnesium and zinc are added to hydrochloric acid. Figure 1 0 1 . 1 What is the order of decreasing reactivity of these four metals? [1 mark] Tick ( ) one box. Zn Ca Cu Mg Ca Cu Mg Zn Cu Zn Ca Mg Ca Mg Zn Cu Do not write outside the box tick 3 *03* Turn over ► IB/M/Jun19/8464/C/1H Do not write outside the box 9 A student wants to make a fair comparison of the reactivity of the metals with hydrochloric acid. 0 1 . 2 Name two variables that must be kept constant. [2 marks] 1 2 0 1 . 3 What is the independent variable in this reaction? [1 mark] 0 1 . 4 Predict the reactivity of beryllium compared with magnesium. Give a reason for your answer. Use the periodic table. [2 marks] Reason 0 1 . 5 A solution of hydrochloric acid contains 3.2 g of hydrogen chloride in 50 cm3 Calculate the concentration of hydrogen chloride in g per dm3 [3 marks] Concentration = g per dm3 surface area volume metal more energy is needed to remove electrons beryllium is less reactive 3.2/50 = 0.064 × 1000 = 64 (g per dm3) 4 *04* IB/M/Jun19/8464/C/1H Do not write outside the 0 2 This question is about salts. box Ammonium nitrate solution is produced when ammonia gas reacts with nitric acid. 0 2 . 1 Give the state symbol for ammonium nitrate solution. [1 mark] 0 2 . 2 What is the formula of nitric acid? [1 mark] Tick ( ) one box. HCl HNO3 H2SO4 NH4OH 0 2 . 3 Ammonia gas dissolves in water to produce ammonia solution. Ammonia solution contains hydroxide ions, OH– A student adds universal indicator to solutions of nitric acid and ammonia. What colour is observed in each solution? [2 marks] Colour in nitric acid Colour in ammonia solution aq tick red purple