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 pK_a 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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