5070/41

Chemistry 5070/41May/June 2010

Cambridge O-Level · Alternative to Practical · worked solutions for every part, with the mark scheme

10
questions
60
marks
60
minutes

Topics Experimental Contexts · Analysis, Conclusions and Evaluation · Observations and Measurements · Qualitative Analysis

Q15MQualitative AnalysisFree sample

A student was given two test-tubes, one containing aqueous ammonia; the other aqueous copper(II) sulfate.

(a)

A few drops of litmus solution were added to aqueous ammonia.
What colour is litmus solution in aqueous ammonia?

______

1M
(b)

What colour is aqueous copper(II) sulfate?

______

1M
(c)

What observations were made when

(i)

a few drops of aqueous ammonia were added to aqueous copper(II) sulfate,

______

1M
(ii)

an excess of aqueous ammonia was added to the solution from (i)?

______

2M

The rest of this paper

9 more questions
  • Q2Experimental Contexts8M
  • Q3Experimental Contexts9M
  • Q4Experimental Contexts1M
  • Q5Experimental Contexts1M
  • Q6Experimental Contexts1M
  • Q7Experimental Contexts · Analysis, Conclusions and Evaluation2M
  • Q8Experimental Contexts · Observations and Measurements · Analysis, Conclusions and Evaluation13M
  • Q9Qualitative Analysis · Observations and Measurements9M
  • Q10Experimental Contexts · Observations and Measurements · Analysis, Conclusions and Evaluation11M
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