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1)How many grams of KH2PO4 are needed to prepare 100.0 mL of a 0.100 M buffer...

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Chemistry

1)How many grams of KH2PO4 are needed toprepare 100.0 mL of a 0.100 M buffer with a pH of 7.25 (assume apKa of 6.86)?

2)How many grams of K2HPO4 are needed toprepare 100.0 mL of a 0.100 M buffer with a pH of 6.75 (assume apKa of 6.86)?

3) Phosphoric acid has three pKa’s (pKa1,pKa2, pKa3), which pKa is most relevant tothe buffer in an experiment?

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