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Solution: Determine the pH of a 0.03 M solution of NaH 2PO4? Assume H3...

Question

Determine the pH of a 0.03 M solution of NaH 2PO4? Assume H3PO4 has a pKa1 of 2.1 and a pKa2 of 7.2 and a pKa3 of 12.7. 

1. 4.36

2. 7.11

3. 4.65

4. 7.40

5. 9.95

6. 1.81