CAIE A Level Chemistry 9701 · Equilibria
Two separate beakers contain equal volumes of dilute hydrochloric acid, , and dilute ethanoic acid, , of the same concentration. A strip of magnesium ribbon is added to each beaker. Describe the differences that would be observed in the two beakers, and explain these differences in terms of the Brønsted–Lowry theory of acids and the extent of dissociation of the two acids.
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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