What will happen to the ph of a solution of carbonic acid if sodium hydrogen carbonate is added?

when sodium hydrogen carbonate (NaHCO3) is added. The pH will increase, or become more basic.

Explanation:

Step 1: Data given

The solution contains carbonic acid = H2CO3

H2CO3 is a weak acid.

We'll add sodium hydrogen carbonate = NaHCO3

Step 2: What will happen to the pH

When we add NaHCO3, there will be formed a buffer of H2CO3/HCO3-

pH = pka+log ([A-]/[HA])

pH = pka+log ([HCO3-]/[H2CO3])

When NaHCO3 is added, [HCO3-] will be greater.

When [HCO3-] will be greater, ([HCO3-]/[H2CO3]) will be greater

When ([HCO3-]/[H2CO3]) will be greater, the pH will increase.

This means when sodium hydrogen carbonate (NaHCO3) is added. The pH will increase, or become more basic.