12 Group 17
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Candidates should be able to:
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12.1 Physical properties of selected Group 17 elements
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(a) state that the colour intensity of Group 17
elements: Cl2, Br2, I2, increase down the group;
(b) explain how the volatility of Group 17
elements decreases down the group
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12.2 Reactions of selected Group 17 elements
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(a) deduce and explain the relative reactivities of
Group 17 elements as oxidising agents from
Eº values;
(b) explain the order of reactivity of F2, Cl2, Br2, I2
with hydrogen, and compare the relative
thermal stabilities of the hydrides;
(c) explain the reactions of chlorine with cold and
hot aqueous sodium hydroxide.
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12.3 Reactions of selected halide ions
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(a) explain and write equations for reactions of
Group 17 ions with aqueous silver ions
followed by aqueous ammonia;
(b) explain and write equations for reactions of
Group 17 ions with concentrated sulphuric
acid.
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12.4 Industrial applications of halogens and their compounds
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(a) describe the industrial uses of the halogens and
their compounds as antiseptic, bleaching agent
and in black-and-white photography;
(b) explain the use of chlorine in water treatment.
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*Not suggest to copy down all of them, just for reference in doing own notes
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