Buffer -- Net Ionic Equations Consider an aqueous buffer solution made with near

Question

Buffer -- Net Ionic Equations

Consider an aqueous buffer solution made with near-equal amounts of acetic acid and an acetate ion salt. Use the "Edit Answer" button to write the complete, balanced, net ionic equations which show the direction of the reaction that takes place upon addition of a small amount of a strong base or a strong acid to the buffered solution.

Use only species chosen from those listed below:

CH3COOH      CH3COO      H2O      H3O+      OH  

H3O+ + _____ _____ + H2O

My answers is H3O+ + OH- H2O + H2O but not correct

Explanation / Answer

Upon addition of acid

CH3COOH + CH3COO-Na+ + HA. = CH3COOH + NaA

Acetic acid form which is a weak acid and dissociated very less and hence no pH changed is observed.

Upon addition of Base

CH3COOH. + CH3COO-Na + + B. = BH+ + CH3COO-Na

Acetate form which also not cause change in pH

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