Cacodylic acid (dimethylarsinic acid, HAsO2(CH3)2HAsO2(CH3)2) is a common buffer used in biology to prepare and fix biological samples. The pKapKa of cacodylic acid is 6.3. a) What is the pHpH of a buffer solution prepared by mixing 20.0 mLmL of 0.0500 molL−1NaOHmolL−1NaOH with 20.0 mLmL of 0.135 molL−1molL−1 cacodylic acid? Express your answer using one decimal place.

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.