AS & A Level Chemistry (9701) — February–March 2023, Paper 33
3 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Question 1 · 10 marks · Practical skills (quantitative analysis: gravimetric determination)
Some metal carbonates occur in a basic form which means that the metal hydroxide is also present. The formula of one form of basic zinc carbonate is ZnCO3•2Zn(OH)2•xH2O, where x…
Answer this question and get it marked →Question 2 · 17 marks · Practical skills (titration: recording results)
In this experiment you will determine the relative formula mass, Mr, of basic zinc carbonate, ZnCO3•2Zn(OH)2•xH2O, by an alternative method. A known mass of basic zinc carbonate…
Answer this question and get it marked →Question 3 · 13 marks · Practical skills (qualitative analysis: thermal decomposition)
FA 5 contains one cation and one anion, both of which are listed in the Qualitative analysis notes. FA 5 is insoluble in water. (FA 5 is copper(II) carbonate, CuCO3.) Transfer…
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