A solution is prepared that is initially 0.13 M in benzoic acid (HC6H5CO₂) and 0.22 M in potassium benzoate (KC6H5CO₂). Complete

Question

A solution is prepared that is initially 0.13 M in benzoic acid (HC6H5CO₂) and 0.22 M in potassium benzoate (KC6H5CO₂). Complete the reaction table below, so that you could use it to calculate the pH of this solution. 
Use x to stand for the unknown change in [H3O+]. You can leave out the M symbol for molarity.

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