What will be the ph of he solution if 0.01 moles of hcl is dissolved in a buffer solution containing 0.02 moles of propanoic acid?

What will be the ph of he solution if 0.01 moles of hcl is dissolved i

1.	What will be the ph of he solution if 0.01 moles of hcl is dissolved in a buffer solution containing 0.02 moles of propanoic acid?
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