CAIE A Level Chemistry 9701 · Group 17
A small volume of potassium chloride solution is added to aqueous silver nitrate. The precipitate formed is then treated with aqueous ammonia. In a separate experiment, solid potassium chloride is warmed with an excess of concentrated sulfuric acid.
Describe the observations for each reaction and write balanced chemical equations for the two reactions that occur when chloride ions react with concentrated sulfuric acid.
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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