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In an acid-base titration, 20.0 mL of Na 2 SO 3 ( K a1 (H 2 SO 3 ) = 1.410 -2 ; K a2

In an acid-base titration, 20.0 mL of Na₂SO₃ (K_a1(H₂SO₃) = 1.410^-2; K_a2(HSO₃^-) = 6.510^-8) 0.1 M are titrated at the 2^nd equivalence point with 30.0 ml of HCl 0.1 M . Calculate the pH of the solution at the 1^st equivalence point

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