Estimate the PH of 0

question 212

Multiple Choice

Estimate the pH of 0.10 M Na₂HPO₄(aq) given pK_a1 = 2.12,
PK_a2 = 7.21,And pK_a3 = 12.68 for phosphoric acid.

• A) 12.68
• B) 9.94
• C) 7.40
• D) 4.67
• E) 2.12

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