Chemistry · Oct / Nov 2024 · Paper 61 · Question 1
0620
As printed in the paper
The question as text
A student has a mixture of copper(II) carbonate powder and crystals of sodium sulfate. Copper(II) carbonate is insoluble in water. Sodium sulfate is soluble in water. The student tries to obtain pure copper(II) carbonate and crystals of pure sodium sulfate from the mixture. Fig. 1.1 shows four of the steps the student carries out. step 1 Add distilled water to the mixture and stir. step 2 Filter the mixture. step 3 Heat the filtrate from step 2 until crystals start to form. step 4 Leave the residue on the filter paper from step 2 in a warm place to dry. residue filtrate heat filter paper residue Fig. 1.1
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Show the answer and mark scheme
1(a)[1]
dissolves
1(b)[1]
water
1(c)[1]
(leave it to) cool
1(d)(i)[1]
wash (with water)
1(d)(ii)[1]
sodium sulfate
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