100. Solving a chemistry problem

100. Solving a chemistry problem

Find the pH of a phosphate buffer mixture prepared from 50 ml of 0.2 N NaH2PO4 solution and 20 ml of 0.4 N Na2HPO4 solution K(H2PO4)=1*10^-7. The degree of dissociation of Na2HPO4 into Na and HPO42- ions is considered equal to 1.

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