CAIE A Level Chemistry 9701 · Equilibria
A student adds aqueous ammonia, (a weak base), to aqueous hydrochloric acid, (a strong acid).
Describe what happens in terms of the Brønsted–Lowry theory of acids and bases. In your answer, state which species is the acid, which is the base, and identify the conjugate acid–base pairs formed.
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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