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Solution: 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(A) 50.0(B) 75.0(C) 100(D) 150

Problem

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

(A) 50.0

(B) 75.0

(C) 100

(D) 150