Chemistry 5070/41 — October/November 2021
Cambridge O-Level · Alternative to Practical · worked solutions for every part, with the mark scheme
Topics Experimental Contexts · Qualitative Analysis · Use of Techniques, Apparatus and Materials · Analysis, Conclusions and Evaluation · Observations and Measurements · Planning Experiments and Investigations
A student uses the apparatus to make ethanoic acid from ethanol.
Name apparatus A and B.
A ______
B ______
Identify two errors in the assembled apparatus shown in the diagram.
- ______
- ______
The errors are corrected and the experiment is started.
State why apparatus B is not heated directly using the flame of a Bunsen burner.
______
Name a piece of apparatus that is used for heating without a flame.
______
Heating with apparatus A in the vertical position is called heating under reflux.
Describe what happens after the vapours from apparatus B enter apparatus A.
______
The rest of this paper
5 more questions- Q2Qualitative Analysis · Observations and Measurements · Experimental Contexts · Analysis, Conclusions and Evaluation · Planning Experiments and Investigations9M
- Q3Qualitative Analysis7M
- Q4Experimental Contexts · Analysis, Conclusions and Evaluation · Qualitative Analysis · Use of Techniques, Apparatus and Materials · Planning Experiments and Investigations · Observations and Measurements16M
- Q5Qualitative Analysis · Experimental Contexts9M
- Q6Use of Techniques, Apparatus and Materials · Analysis, Conclusions and Evaluation · Experimental Contexts11M