How many mL of 1.00 M NaOH must be added to 100 ml of 0.1 M H3PO4 solution to obtain a phosphate buffer solution with pH of about 8.2? (The pK values of H3PO4 are pK1 = 2.1, pK2 = 8.2, pK3 = 12)

Question

Prashant Kotian · Accepted Answer

Correct answer: B. 3 4 2 4 2 10 10 10 H PO NaOH NaH PO H O    Let millimole of NaOH further added are ‘x’ 2 4 2 4 2 10 x 0 10 x x NaH PO NaOH Na HPO H O              x pH

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