CAIE A Level Chemistry 9701 · The Periodic Table: chemical periodicity
Describe the reactions of the chlorides , , , and with water. For each chloride, write an equation for any reaction that takes place and state the approximate pH of the resulting solution. Explain the trends in the behaviour of these chlorides towards water and in the acidity of the solutions in terms of bonding and electronegativity.
7 marks, so the mark scheme is looking for about 7 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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