100 ml of 0.1 M aqueous solution of sodium phosphate is titrated using 0.1 M HCl. Now, choose the correct statement(s) of the following: (For H3PO4: Ka1 = 10^-3; Ka2 = 10^-8 and Ka3 = 10^-13 at 25°C)

Question

100 ml of 0.1 M aqueous solution of sodium phosphate is titrated using 0.1 M HCl. Now, choose the correct statement(s) of the following:

(For H3PO4: Ka1 = 10^-3; Ka2 = 10^-8 and Ka3 = 10^-13 at 25°C)

Prashant Kotian · Accepted Answer

Correct answer: A,B,C. (i) 3 2 4 4 PO H HPO m.mol. 10 5 0 after neutralization 5 0 5      So, 3 a pH pK 13   (Buffer) (ii) 3 2 4 4 PO H HPO m.mol. 10 10 0 after neutralization 0 0 10      So, 8 13 pH

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