CAIE A Level Chemistry 9701 · Equilibria
Two beakers each contain 100 cm³ of an aqueous solution of a different acid. Beaker A contains ethanoic acid, , and beaker B contains hydrochloric acid, . Both solutions have the same concentration and the same temperature. A conductivity probe placed in each solution records a higher reading in beaker B than in beaker A.
Explain, in terms of the Brønsted–Lowry theory, why the conductivity of the solution in beaker B is higher than that in beaker A.
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.
Explain means: Give the reasons or the mechanism: why or how something happens. Link each point to the next with because, so or which means. A list of facts with no links usually loses the reasoning marks.
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