Question

A solution contains 10. mmol of H3PO4 and 5.0 mmol of NaH2PO4. How many milliliters of 0.10 M NaOH must be added to reach the second equivalence point of the titration of the H3PO4with NaOH?
A) 250 mL
B) 2.0 x102 mL
C) 50 mL
D) 150 mL
E) 1.0 x102 mL

Answer

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