[noco]

The equation is given for both questions :
CH₃COOH + C₂H₅OH <--> CH₃CO₂C₂H₅ + H₂O

Question 1:
In an experiment to determine K_c, 1.00 mol of ethanoic acid was allowed to reach equilibrium with 1.00 mol of ethanol in the presence of 0.100mol of H⁺ dissolved in 1.00mol of water. It forms an homogeneous mixture. At equilibrium, it was found that 0.43 mol of ethanoic acid was present. How many moles of water are present at equilibruim ?

In this case, does it mean that the initial number of mole of water is 1.0 mol ?
Why the question gives me the number of mole of hydrogen ion ?
I'm not sure with that, can anyone tell me that ?

Question 2:
A mixture of 6.0g of ethanoic acid and 6.0g of ethanol was added to 4.4g of ethyl ethanoate and the overall mixture allowed to reach equilibrium. It was found that 0.040mol of ethanoic acid was present in the equilibrium mixture.

This is my analysis for the number of moles of the chemicals

CH₃COOH
Initial number of mole (n) : 0.1
At equilibrium (eq) : 0.04

C₂H₅OH
n : 0.13
eq : 0.07

CH₃COOC₂H₅
n : 0.05
eq : 0.11

H₂O
n : 0
eq : 0.06

Correct me please if I'm wrong .
I want to know whether my analysis is wrong or not. Thanks

[sdekivit]

where are your reaction equations ?

These are problems about the formation of an ester of ethanoic acid and ethanol, where H(+) acts as a catalyst.

[noco]

Question 1 :
Yes , thank for your explanation.
I want to know the number of mole of water presents at equilibrium. Can ayone tell me and state together how you get the number

Question 2 :
I do know that is the formation of ester. But the numbers of mole which I wrote there , are them correct ?

[Neecze]

For problem 1: this is a redoxreaction of an COOH, group to a primary alcohol, where H(+) is needed.

I don't think so. I think this is an esterification reaction and hydrogen ions are catalyst of this reaction. In equation of reaction:

CH₃COOH + C₂H₅OH <=> CH₃COOC₂H₅ + H₂O

water also occurs so number of moles of water is important information

C2H5
n : 0

Do you mean C₂H₅ is ethanol ? But in "question 2" is written that there was 6,0g of ethanol in mixture.

[noco]

Question 1 :
I still can't see any number of mole for water .
It is my question doesn't make sense ?

Question 2 :
My mistake, thank you Neecze for enlighten me .
Correction has been done. Is there any mistake ?

[Donaldson Tan]

Search this forum for ICE table

[sdekivit]

For problem 1: this is a redoxreaction of an COOH, group to a primary alcohol, where H(+) is needed.

I don't think so. I think this is an esterification reaction and hydrogen ions are catalyst of this reaction. In equation of reaction:

CH₃COOH + C₂H₅OH <=> CH₃COOC₂H₅ + H₂O

water also occurs so number of moles of water is important information

sorry, you're right. I didn't saw the ethanoic acid. I modified my post.