Unit C! Topic 3 Acids

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Topic 3 ­ Acids
3.1 Recall that hydrochloric acid is produced in the stomach to:
a help digestion
b kill bacteria
3.2 Describe indigestion remedies as containing substances that neutralise excess
stomach acid
3.3 Investigate the effectiveness of different indigestion remedies
3.4 Recall that acids are neutralised by:
a metal oxides
b metal hydroxides
c metal carbonates
to produce salts (no details of salt preparation techniques or ions are required)
3.5 Recall that:
a hydrochloric acid produces chloride salts
b nitric acid produces nitrate salts
c sulfuric acid produces sulfate salts
3.6 Describe electrolysis as a process in which electrical energy, from a d.c. supply,
decomposes compounds, by considering the electrolysis of dilute hydrochloric acid to
produce hydrogen and chlorine
(explanations of the reactions at the electrodes are not required)
3.7 Investigate the electrolysis of dilute hydrochloric acid
3.8 Describe the chemical test for hydrogen
3.9 Describe the chemical test for chlorine
Recall that chlorine can be obtained from sea water by electrolysis
(explanations of the reactions at the electrodes are not required)
3.11 Describe chlorine as a toxic gas and that this leads to potential hazards
associated with its large-scale manufacture
3.12 Describe the use of chlorine in the manufacture of bleach and of the polymer
poly(chloroethene) (PVC)
n our world
3.13 Recall that water can be decomposed by electrolysis to form hydrogen and
oxygen
3.14 Describe the chemical test for oxygen

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