The pKa of hypochlorous acid is 7.530. A 53.0 mL solution of 0.100 M sodium hypochlorite (NaOCl) is titrated with 0.303 M HCl. Calculate the pH of the solutiona) after the addition of 6.47 mL of 0.303 M HCl. b) after the addition of 18.4 mL of 0.303 M HCl. c) at the equivalence point with 0.303 M HCl.

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Ions gain or lose electrons

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).