Cacodylic acid (dimethylarsinic acid, HAsO2(CH3)2) is a common buffer used in biology to prepare and fix biological samp...

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Cacodylic acid (dimethylarsinic acid, HAsO2(CH3)2) is a common buffer used in biology to prepare and fix biological samp...

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.

1. What is the pH of a buffer solution prepared by mixing 20.0 mL of 0.0500 molL−1NaOH with 20.0 mL of 0.140 molL−1 cacodylic acid?

2. What is the pH of the buffer solution in part A after 0.0002 moles of H3O+ was added to the mixture?

Express your answer using one decimal place.

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Answer 1

Answer #1

Solution Given that. A mol L-Maot o.o ml Or o.eSoo Cacadyic acid Do.o m Ofo-luo ml -1 pta cacedylic acid =6.3. P-pa tleg (bee PARTB mo + Added H30 o.o00 mo o-a mmo pit = *a + ba e-H30+ acid-bae+Hzc 6.3 tog 0.2) 2.8-0.2 6.3 tlog O8 G3 o5 58 2 5.88

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Answer 2

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Cacodylic acid (dimethylarsinic acid, HAsO2(CH3)2) is a common buffer used in biology to prepare and fix biological samp...

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