Salt preparations
3 marks · EasyUse the solubility rules to answer the following questions.
Are all nitrates soluble or insoluble in water?
Give one example of a soluble sulfate.
Name one insoluble chloride.
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(a) Soluble
(b) Any of: sodium sulfate, potassium sulfate, ammonium sulfate, copper(II) sulfate, magnesium sulfate, etc.
(c) Either: silver chloride or lead(II) chloride
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Marking points
B1 (a) · 1 mark · Correctly states that all nitrates are soluble.
B1 (b) · 1 mark · Names a correct soluble sulfate compound.
B1 (c) · 1 mark · Names an insoluble chloride (lead(II) chloride or silver chloride).
Worked solution
(a) All nitrates are soluble in water.
(b) Example: sodium sulfate is a soluble sulfate.
(c) Example: silver chloride is an insoluble chloride.