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[solution] » Calculate the pH of buffers based on the recipes A: 17.91g Na 2

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Calculate the pH of buffers based on the recipes A: 17.91g Na 2
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Calculate the pH of buffers based on the recipes

A: 17.91g Na2HPO4*12H2O

1.7mL 1M NaOH

998.3mL H2O

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B: 13.16g citric acid monohydrate

25mL 1M NaOH

998.3mL H2O

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C: 0.49g NaH2PO4*H2O

12.49g Na2HPO4*12H2O

1L H2O

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D: 17.91g NaH2PO4*12H2O

1L H2O

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Compound MW pKa if ionic strength =0
Citric acid monohydrate  210.14 g/mol 3.128, 4.761, 6.396
Na2HPO4*12H2 358.14 g/mol 2.148, 7.198, 12.375
Na2HPO4*H2 137.99 g/mol 2.148, 7.198, 12.375

 

 







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