Making ethanol by the hydration of ethene
2 marks · EasyThe hydration of ethene to produce ethanol is shown in the balanced equation below:
Calculate the maximum number of moles of ethanol that can be produced if you start with 12 mol of ethene and excess steam. State your answer clearly.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
12 mol (±0)
Common mistakes: Incorrectly dividing or multiplying by 2; Using steam as the limiting reactant
Show mark scheme and worked solution
Marking points
M1 · 1 mark · Identifies 1:1 mole ratio between ethene and ethanol using the balanced equation.
A1 · 1 mark · Correctly calculates 12 mol ethanol as the maximum product. (follow-through)
Worked solution
From the equation, 1 mol of ethene reacts to give 1 mol of ethanol:
So, with 12 mol of ethene and excess steam, you produce:
Maximum moles of ethanol produced = 12 mol