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April 27, 2015

Homework Help: chemistry

Posted by hannah on Tuesday, March 19, 2013 at 4:50pm.

Acetic acid, CH3CO2H, is the active ingredient in vinegar. It's often abbreviated "HOAc". Vinegar is acidic because acetic acid makes H3O+ when it partially ionizes in water:
HOAc(aq) + H2O H3O+(aq) + OAc–(aq)
Suppose that you have a solution of acetic acid in water that is in equilibrium. How will the acidity of this solution change if you do each of these things to it?

(a) Add more acetic acid (HOAc)
The solution will become less acidic (i.e. [H+] will decrease).
The solution will become more acidic (i.e. [H+] will increase).
The acidity of the solution will not change.

(b) Add sodium acetate (NaOAc)

The solution will become less acidic.
The acidity of the solution will not change.
The solution will become more acidic.

(c) Add NaCl
The solution will become less acidic.
The solution will become more acidic.
The acidity of the solution will not change.

(d) Add Ag+(aq), which reacts with acetate ions to make a precipitate: Ag+(aq) + OAc–(aq) AgOAc(s)
The solution will become more acidic.
The acidity of the solution will not change.
The solution will become less acidic.

a)more acidic?
b)less acidic?
c)will noit chnage
d)less

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