AQA 2022// GCSE CHEMISTRY Foundation Tier Paper 2

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Materials For this paper you must have: • a ruler • a scientific calculator • the periodic table (enclosed). Instructions • Use black ink or black ball-point pen. • Pencil should only... be used for drawing. • Fill in the boxes at the top of this page. • Answer all questions in the spaces provided. Do not write outside the box around each page or on blank pages. • If you need extra space for your answer(s), use the lined pages at the end of this book. Write the question number against your answer(s). • Do all rough work in this book. Cross through any work you do not want to be marked. • In all calculations, show clearly how you work out your answer. Information • The maximum mark for this paper is 100. • The marks for questions are shown in brackets. • You are expected to use a calculator where appropriate. • You are reminded of the need for good English and clear presentation in your answers. Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. GCSE CHEMISTRY Foundation Tier Paper 2 F 2 *02* IB/M/Jun22/8462/2F Do not write outside the 0 1 box This question is about water. A student investigated pure water. The student measured: • the boiling point of pure water • the pH of pure water. 0 1 . 1 Complete the sentences. Choose answers from the box. [2 marks] 0 4 7 10 25 100 Pure water has a boiling point of °C. Pure water has a pH of . 0 1 . 2 What could the student use to measure the pH of pure water? [1 mark] 3 *03* Turn over ► IB/M/Jun22/8462/2F Do not write outside the A different student investigated sea water. box Sea water contains dissolved solids. This is the method used. 1. Measure a 50 cm3 sample of the sea water. 2. Heat the sample until all the water has evaporated. 3. Measure the mass of solid that remains. 4. Repeat steps 1 to 3 three more times. 0 1 . 3 Which two pieces of equipment were needed in this investigation? [2 marks] Tick () two boxes. Balance Measuring cylinder Ruler Thermometer Timer Question 1 continues on the next page 4 *04* IB/M/Jun22/8462/2F Do not write outside the 0 1 box . 4 Table 1 shows the results. Table 1 Sea water sample Mass of solid that remained in grams 1 1.73 2 1.70 3 1.75 4 1.78 Calculate the mean mass of solid that remained. [2 marks] Mean mass = g 0 1 . 5 A 50 cm3 sample of sea water from a different source contained 1.50 g of dissolved solids. Calculate the mass of dissolved solids in 1000 cm3 of this sea water. [2 marks] Mass = g 5 *05* Turn over ► IB/M/Jun22/8462/2F Do not write outside the box 11 Sodium chloride is a dissolved solid in sea water. Sodium chloride contains sodium ions and chloride ions. 0 1 . 6 Complete the sentence. Choose the answer from the box. [1 mark] crimson lilac yellow The student tested sea water for sodium ions using a flame test. The colour of the flame was . 0 1 . 7 Complete the sentence. Choose the answer from the box. [1 mark] brown green white The student tested sea water for chloride ions by adding nitric acid and silver nitrate solution. The colour of the precipitate formed was . Turn over for the next question 6 *06* IB/M/Jun22/8462/2F Do not write outside the 0 2 box This question is about hydrocarbons in crude oil. 0 2 . 1 Table 2 shows information about three fractions obtained from crude oil. Table 2 Fraction Boiling point range in °C A 200–300 B 100–150 C Below 30 Figure 1 shows the fractionating column used to separate fractions A, B and C. Figure 1 The temperature of the fractionating column is: • 30 °C at the top • 400 °C at the bottom. Complete Figure 1 to show where fractions A, B and C are collected. [1 mark] 7 *07* Turn over ► IB/M/Jun22/8462/2F Do not write outside the 0 2 box . 2 Table 3 shows information about three fractions obtained from crude oil. Table 3 Fraction Range of number of carbon atoms in each molecule Petrol 5–12 Diesel oil 15–19 Heavy fuel oil 20–40 Complete the sentences. Choose answers from the box. [2 marks] lower the same higher Compared to petrol, the viscosity of heavy fuel oil is . Compared to petrol, the flammability of diesel oil is . Question 2 continues on the next page 8 *08* IB/M/Jun22/8462/2F Do not write outside the Table 4 box shows the percentage of two fractions obtained from two different sources of crude oil. Table 4 Source Percentage (%) of fraction Kerosene Heavy fuel oil J 13 30 K 4 44 0 2 . 3 Complete Figure 2. You should: • complete the y-axis scale • plot the percentage of the heavy fuel oil fraction obtained from source K. Use Table 4. [2 marks] Figure 2 9 *09* Turn over ► IB/M/Jun22/8462/2F Do not write outside the 0 2 box . 4 Kerosene is in higher demand than heavy fuel oil. Suggest why crude oil from source J is in higher demand than crude oil from source K. Use Table 4. [1 mark] Large hydrocarbon molecules can be cracked to produce smaller hydrocarbon molecules including alkanes. 0 2 . 5 Which two of the following can be used to crack large hydrocarbon molecules? [2 marks] Tick () two boxes. A catalyst A fertiliser Air Ozone Steam 0 2 . 6 Alkanes have the general formula CnH2n+2 Complete the formula of the alkane molecule containing 11 carbon atoms. [1 mark] C11H___ 10 *10* IB/M/Jun22/8462/2F Do not write outside the box 12 0 2 . 7 C2H6 is an alkane. Which type of bond is found in a C2H6 molecule? [1 mark] Tick () one box. A double bond between two carbon atoms. A double bond between two hydrogen atoms. A single bond between two carbon atoms. A single bond between two hydrogen atoms. 0 2 . 8 Which two substances are produced when alkanes completely combust? [2 marks] Tick () two boxes. Carbon Carbon dioxide Carbon monoxide Hydrogen Water 11 *11* Turn over ► IB/M/Jun22/8462/2F Do not write outside the Turn over for the next question box DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED 12 *12* IB/M/Jun22/8462/2F Do not write outside the 0 3 This question is about box the Earth’s atmosphere. Table 5 shows: • the estimated percentages of gases in the Earth’s early atmosphere • the percentages of gases in the Earth’s atmos [Show More]

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