Calculate the pH of a mixture that contains 0.18 M of HNO3 and 0.27 M of...

Question

Question

Calculate the pH of a mixture that contains 0.18 M of HNO3 and 0.27 M of HC6H5O.

Please show me how to do this! I'm not sure how to solve for the pH when given two substances. Thanks!

Answer 1

Answer #1

HNO3 is strong acid and C6H5OH is weaker acid

when they are mixed the acidity mainly comes from strong acid

Hence [H+] contribution is most from HNO3

Hence [H+] = [HNO3] = 0.18 M

pH = -log [H+]

= -log ( 0.18)

= 0.745

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Answer 2

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