Chemistry 5070/41 — October/November 2016
Cambridge O-Level · Alternative to Practical · worked solutions for every part, with the mark scheme
Topics Experimental Contexts · Qualitative Analysis · Analysis, Conclusions and Evaluation · Use of Techniques, Apparatus and Materials · Observations and Measurements · Planning Experiments and Investigations
A student separates a mixture of pentane and hexane using the apparatus shown. Pentane collects in the conical flask.
Name apparatus A.
______
What is the purpose of apparatus A?
______
Name apparatus B.
______
Identify two errors in the student's apparatus.
- ______
- ______
The errors are corrected before the separation is started.
Name the process used to separate the mixture of liquids.
______
State why a Bunsen burner should not be used to heat the mixture of pentane and hexane.
______
What should be used instead of a Bunsen burner?
______
Suggest why pentane collects in the conical flask before hexane.
______
The rest of this paper
8 more questions- Q2Experimental Contexts · Use of Techniques, Apparatus and Materials · Qualitative Analysis4M
- Q3Analysis, Conclusions and Evaluation1M
- Q4Qualitative Analysis1M
- Q5Experimental Contexts1M
- Q6Experimental Contexts · Planning Experiments and Investigations5M
- Q7Experimental Contexts · Analysis, Conclusions and Evaluation · Use of Techniques, Apparatus and Materials · Observations and Measurements16M
- Q8Analysis, Conclusions and Evaluation · Qualitative Analysis11M
- Q9Experimental Contexts · Qualitative Analysis · Analysis, Conclusions and Evaluation · Observations and Measurements11M