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Estimate the PH of the Resulting Solution Prepared by Mixing

Question 30

Multiple Choice

Estimate the pH of the resulting solution prepared by mixing 1.0 mole of solid disodium phosphate (Na2HPO4) and 1.25 mole of hydrochloric acid. The pKa values for phosphoric acid are 2.1, 7.2, 12.4.


A) pH < 2.1
B) pH = 2.1
C) 2.1 < pH < 7.2
D) pH = 7.2
E) 7.2 < pH < 12.4

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