1) If 22.0 mL of 2.3 M C2H5NH2are titrated with 0.9 M HCl, what is the pH at 13.1 mL?
2) If 25.1 mL of 2.2 M CH3COOH are titrated with 0.9M NaOH, what is the pH at 14.9 mL?
3) Exactly 47.0 mL of 0.2 M HNO2 are titrated with a0.2 M NaOH solution. What is the pH at the equivalence point ?
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