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A buffer solution is composed of 1.723 g ofKH2PO4and 5.351 g of Na2HPO4 . ( ka...

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Chemistry

A buffer solution is composed of 1.723 g ofKH2PO4and 5.351 g ofNa2HPO4 . ( ka for dihydrogen phosphate ion is 6.2x10^-8 .)

pH =  

Mass =  g

A-What is the pH of the buffer solution?

B-What mass of KH2Po4 must be added to decrease the buffersolution pH by 0.10 unit from the value calculated in part a?

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