Cacodylic acid (dimethylarsinic acid, HASO2(CH3)2) is a common buffer used in biology to prepare and fix biological samples. The pKa of cacodylic acid is 6.3.Part AWhat is the pH of a buffer solution prepared by mixing 20.0 mL of 0.0600 mol L-1 NaOH with 20.0 mL of 0.105 mol L-1cacodylic acid?Express your answer using one decimal place.pH = 6.4SubmitPrevious AnswersCorrectPart BWhat is the pH of the buffer solution in part A after 0.0002 moles of H3 o+ was added to the mixture?Express your answer using one decimal place.pH =

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What is the pH of a buffer solution prepared by mixing 20.0 mL of 0.0600 mol L-' NaOH with 20.0 mL of 0.105 mol L- cacodylic acid?

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Question

Cacodylic acid (dimethylarsinic acid, HASO2(CH3)2) is a common buffer used in biology to prepare and fix biological samples. The pKa of cacodylic acid is 6.3.
Part A
What is the pH of a buffer solution prepared by mixing 20.0 mL of 0.0600 mol L-1 NaOH with 20.0 mL of 0.105 mol L
-1
cacodylic acid?
Express your answer using one decimal place.
pH = 6.4
Submit
Previous Answers
Correct
Part B
What is the pH of the buffer solution in part A after 0.0002 moles of H3 o+ was added to the mixture?
Express your answer using one decimal place.
pH =

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