Chemistry > GCSE QUESTION PAPER > GCSE COMBINED SCIENCE: TRILOGY Foundation Tier Chemistry Paper 2F (All)

GCSE COMBINED SCIENCE: TRILOGY Foundation Tier Chemistry Paper 2F

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Information • The maximum mark for this paper is 70. • The marks for questions are shown in brackets. • You are expected to use a calculator where appropriate. • You are reminded of the ne ... ed 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 COMBINED SCIENCE: TRILOGY Foundation Tier Chemistry Paper 2F F2 *02* IB/M/Jun21/8464/C/2F 0 1 Fresh water contains low levels of dissolved salts. Water reacts with anhydrous copper sulfate in a reversible reaction. The word equation for the reaction is: water + anhydrous copper sulfate ⇌ hydrated copper sulfate 0 1 . 1 How does the equation show that the reaction is reversible? [1 mark] 0 1 . 2 Complete the sentences. Choose answers from the box. [2 marks] blue green orange white yellow The colour of anhydrous copper sulfate is . The colour of hydrated copper sulfate is . Do not write outside the box3 *03* Turn over ► IB/M/Jun21/8464/C/2F Do not write outside the 0 1 . 3 Figure 1 shows anhydrous copper sulfate in a sealed container. box Figure 1 Suggest one reason why anhydrous copper sulfate is kept in a sealed container. [1 mark] Question 1 continues on the next page4 *04* IB/M/Jun21/8464/C/2F Do not write outside the Sodium chloride dissolves in water to form sodium chloride solution. box 0 1 . 4 Draw one line from each substance to the description of the substance. [2 marks] Substance Description of substance Sodium chloride solution Water Compound Element Hydrocarbon Mixture 0 1 . 5 Name the process used to obtain solid sodium chloride from sodium chloride solution. [1 mark]5 *05* Turn over ► IB/M/Jun21/8464/C/2F Do not write outside the box 11 0 1 . 6 Two processes used to obtain potable water from fresh water are: • filtering • sterilising. Give one reason why each process is used [Show More]

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