Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
201–210 of 317 · Easy
Question 201
2 marks · Easy
Answer and see the solution →Glucose can be converted to ethanol and carbon dioxide by fermentation.
Calculate the maximum volume of ethanol that can be produced by fermentation of 10 g of glucose at room temperature, if the yield is 100%. Use the following information:
Relative molecular mass (M_r) Molar volume of gas at room temperature Glucose (C_6H_{12}O_6) = 180 Ethanol (C_2H_5OH) = 46 1 mol = 24 dm³ (for gases) Give your answer in grams. (You may assume the density of ethanol is not needed for this calculation.)
Question 202
1 mark · Easy
Answer and see the solution →Explain what happens to the unreacted ethene during the industrial hydration process to make ethanol.
Question 203
3 marks · Easy
Answer and see the solution →(a)[1 mark]State the word equation for the hydration of ethene to produce ethanol.
(b)[2 marks]Write the balanced symbol equation for the reaction.
Question 204
2 marks · Easy
Answer and see the solution →The hydration of ethene is carried out at high temperature and pressure in the presence of a catalyst.
(a)[1 mark]State the temperature (in °C) commonly used in this process.
(b)[1 mark]Give the range of pressures (in atmospheres) that is typically used.
Question 205
2 marks · Easy
Answer and see the solution →Explain why unreacted ethene is recycled during the production of ethanol by hydration of ethene.
Question 206
3 marks · Easy
Answer and see the solution →Masses involved in the hydration of ethene experiment Substance Mass used (g) Ethene 56 Steam 18 Ethanol 74 (a)[1 mark]Based on the table, write the word equation for the hydration of ethene.
(b)[1 mark]Write the balanced symbol equation for this reaction.
(c)[1 mark]State the mass of ethanol produced when 56 g of ethene reacts completely.
Question 207
1 mark · Easy
Answer and see the solution →Name the catalyst used in the hydration of ethene to make ethanol.
Question 208
3 marks · Easy
Answer and see the solution →(a)[1 mark]What proportion of ethene typically reacts in a single pass through the hydration process?
(b)[1 mark]Describe what happens to the remainder of the ethene.
(c)[1 mark]Explain why this recycling of ethene is important for industry.
Question 209
2 marks · Easy
Answer and see the solution →The 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.
Question 210
1 mark · Easy
Answer and see the solution →State the main raw material used for producing ethanol by the fermentation method.