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1) Calculate the pH of a 100 ml solution containing 0.6 grams of NaH2PO4 and 0.142...

1) Calculate the pH of a 100 ml solution containing 0.6 grams of NaH2PO4 and 0.142 grams of Na2HPO4

The pKa of NaH2PO4 = 7.2

Mol. Wt. of NaH2PO4 = 120

Mol. Wt. Of Na2HPO4 = 142

2) Calculate the pH of a solution obtained when 1.0 ml of 0.1 M HCL is added to 99.0 ml pure water.

3) Calculate the pH of the solution obtained by adding 1.0 ml of 0.1 M HCl to 99 ml of buffer solution containing 0.0063 moles of NaH2PO4 and 0.100 moles of Na2HPO4

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