dat organic chemistry question help

[depot123]

Which of the following variation of experimental conditions has essentially no effect upon the position of the equilibrium of the hydrochloric acid catalyzed esterification of acetic acid with ethyl alcohol?

1) addition of more hydrochloric acid
2) removal of water as it is form
3) removal of ester as it is from
4) addition of excess ethyl alcohol
5) addition of excess acetic acid

Answer is 4
I don't understand it why it is 4. I choose 1, what the effect would have on addition of more HCL? and water?

thanks

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[ttpharm]

Which of the following variation of experimental conditions has essentially no effect upon the position of the equilibrium of the hydrochloric acid catalyzed esterification of acetic acid with ethyl alcohol?

1) addition of more hydrochloric acid
2) removal of water as it is form
3) removal of ester as it is from
4) addition of excess ethyl alcohol
5) addition of excess acetic acid

Answer is 4
I don't understand it why it is 4. I choose 1, what the effect would have on addition of more HCL? and water?


thanks

Well, 1 mol of HCl = 1 mol of Acetic acid = 1 mol of ethyl alcohol in the balanced equation

HCl and Acetic acid are limiting reagents if excess ethyl alcohol is added. Therefore, it will not form more product.