A student carries out experiments using two different electrolytes in the apparatus shown. (a) Complete the table. electrolyte name of product at the anode observations at the anode name of product at the cathode observations at the cathode --- --- --- --- --- concentrated aqueous sodium chloride bubbles of colourless gas oxygen copper (b) Give a test and observation to identify oxygen gas. \_\_\_\_\_\_

Chemistry 5070/42 — October/November 2017

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

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Topics Experimental Contexts · Qualitative Analysis · Analysis, Conclusions and Evaluation · Use of Techniques, Apparatus and Materials · Planning Experiments and Investigations · Observations and Measurements

Q17MExperimental ContextsQualitative AnalysisFree sample

A student carries out experiments using two different electrolytes in the apparatus shown.

Fig. 1.1

(a)

Complete the table.

electrolyte	name of product at the anode	observations at the anode	name of product at the cathode	observations at the cathode
concentrated aqueous sodium chloride				bubbles of colourless gas
	oxygen		copper

(b)

Give a test and observation to identify oxygen gas.

______

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5 more questions

Q2Experimental Contexts · Use of Techniques, Apparatus and Materials5M
Q3Qualitative Analysis · Planning Experiments and Investigations · Analysis, Conclusions and Evaluation7M
Q4Analysis, Conclusions and Evaluation · Experimental Contexts · Use of Techniques, Apparatus and Materials · Planning Experiments and Investigations · Observations and Measurements22M
Q5Qualitative Analysis · Experimental Contexts9M
Q6Experimental Contexts · Observations and Measurements · Analysis, Conclusions and Evaluation10M

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