What volume (in mL) of 0.0500 M phosphoric acid is needed to titrate completely 25.0 mL of 0.150 M barium hydroxide solution to a phenolphthalein end point?
³Ba(OH)₂ + 2H₃PO₄ → Ba₃(PO₄)₂ + 6H₂O

Question

What volume (in mL) of 0.0500 M phosphoric acid is needed  to titrate completely 25.0 mL of 0.150 M barium hydroxide solution to a  phenolphthalein end point?
3Ba(OH)2 + 2H3PO4 → Ba3(PO4)2 + 6H2O

Accepted Answer

Correct answer: A.

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