AL CHEM REVIEW AL CHEM Written Practical Inorganic

AL CHEM REVIEW

AL CHEM Written Practical [Inorganic Chemistry] ~ Preparation of Gases ~ dry Cl 2 dry HCl dry NH 3 dry SO 2 drying agent used ? ? How to collect? ? (upward/downward delivery? ) p. 1

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1994 P. II Q. 4 (a) Describe how a sample of dry chlorine is prepared in the laboratory. State the safety precaution(s) that is / are required. (5 M) p. 7

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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. (7 M) p. 9

1996 P. II Q. 5 p. 10

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. (6 M) p. 11

1997 P. I Q. 7 p. 12

p. 13

2001 P. I Q. 7 (a) Suggest how you would prepare a sample of dry hydrogen chloride gas in a school laboratory. Draw a labelled diagram of the set-up of apparatus used in the preparation. (4 M) p. 14

2001 P. I Q. 7 p. 15

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. S 2 O 82 -(aq) + 2 I-(aq) 2 SO 42 -(aq) + I 2(aq) (5 M) p. 16

2002 P. I Q. 7 p. 17