Chemistry · Oct / Nov 2022 · Paper 62 · Question 3
0620
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Solid I and solid J were analysed. Tests were done on each substance. tests on solid I tests observations test 1 Dilute hydrochloric acid was added to a boiling tube containing solid I. Any gas produced was tested. effervescence was seen, the solid dissolved to form a colourless solution the gas turned limewater milky test 2 A flame test was carried out on the solution formed in test 1. a red flame was seen
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3(a)[1]
carbon dioxide / CO2
3(b)[2]
lithium / Li+
carbonate / CO32–
3(c)[2]
M1 white precipitate
M2 dissolves
3(d)[2]
M1 white precipitate
M2 remains / does not redissolve / no change
3(e)[1]
no change / (remains) colourless
3(f)[1]
white precipitate
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