Chemistry 5070 · O Level · Reversible reactions and equilibrium

Reversible reactions and equilibrium — practice question

Ethanol is produced by reacting ethene with steam. The conditions are $300\,^{\circ}\text{C}$, high pressure and a phosphoric acid catalyst.
(a(i))[2]

Predict what happens to the amount of ethanol in the equilibrium mixture if the temperature is decreased while the pressure stays the same. Explain your answer.

(a(ii))[2]

Predict what happens to the amount of ethanol in the equilibrium mixture if the pressure is decreased and the temperature stays the same. Explain your answer.

(b)[3]

Describe the production of aqueous ethanol by fermenting glucose. Give the equation and the essential conditions required for this fermentation.

Worked solution & mark scheme

This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “A greater amount of ethanol” …

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