Acetic acid and ethanol react to form ethyl acetate and water, like this: HCH,CO
ID: 1086646 • Letter: A
Question
Acetic acid and ethanol react to form ethyl acetate and water, like this: HCH,CO-(aq)+C2H5OH(aq) GH,CO2CH,(aq)-H2O(,) Imagine 94. mmol of HCH,CO are added to a flask containing a mixture of HCH,CO, C2H,OH, C2H,CO2CH and H20 at equilibrium, and then answer the following questions Zero. Greater than zero, but less than the rate of the reverse reaction Greater than zero, and equal to the rate of the reverse reaction Greater than zero, and greater than the rate of the reverse reaction. What is the rate of the forward reaction before any HCH3CO2 has been added to the flask? Zero. What is the rate of the forward reaction just after the HCH3CO2 has been added to the flask? Greater than zero, but less than the rate of the reverse reaction Greater than zero, and equal to the rate of the reverse reaction Greater than zero, and greater than the rate of the reverse reaction. Zero. Greater than zero, but less than the rate of the reverse reaction What is the rate of the forward reaction when the system has again reached equilibrium? Greater than zero, and equal to the rate of the reverse reaction Greater than zero, and greater than the rate of the reverse reaction. None Some, but less than 94. mmol How much more HCH3CO2 is in the flask when the system has again reached equilibrium? 94. mmol More than 94. mmol.Explanation / Answer
For the given reaction,
acetic acid combines with ethanol to produce ethylacetate and water
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The rate of forward reaction before any HCH3CO2 was added : Greater than zero and equal to the rate of the reverse reaction.
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Rate of the forward reaction just after HCH3CO2 has been added to the flask : Greater than zero and greater than the rate of the reverse reaction.
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Rate of the forward reaction when the system has again reached equilibrium : Greater than zero and equal to the rate of the reverse reaction.
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The amount of HCH3CO2 in the flask when the system has again reached equilibrium : some, but less than 94 mmol.
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