10 1996 P.II Q.5 (c) (i), (ii)(i) Write a balanced equation for the reaction of concentrated sulphuric (VI) acid on potassium chloride.(ii) Briefly describe how a sample of dry hydrogen chloride can be prepared in the laboratory, using the above reaction.Draw a labelled diagram of the laboratory set-up and state the safety precaution(s) that is / are required.(7M)p.9
12 1997 P.I Q.7(a) Briefly describe how a sample of dry chlorine gas can be prepared in the laboratory.Draw a labelled diagram of the laboratory set-up and state the safety precaution(s) that is / are required.(6M)p.11
17 2002 P.I Q.7(b) Devise an experiment, using chemicals and apparatus commonly available in a school laboratory, to show that the reaction of peroxodisulphate (VI) ions with iodide ions can be catalyzed by iron (III) ions.S2O82-(aq) + 2I-(aq) 2SO42-(aq) + I2(aq)(5M)p.16
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