1)Hypochlorous acid (HOCl), a weak acid (pKa = 7.6) can be used for disinfecting water. If...

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Chemistry

1)Hypochlorous acid (HOCl), a weak acid (pKa = 7.6) can be usedfor disinfecting water. If 1 mg of HOCl is added to pure water tomake up 1 L of liquid volume, what is the equilibrium pH?
(b) The pH of the solution in part (a) is to be raised to 7.0 byaddition of NaOH, a strong base. What mass (in grams) of NaOH mustbe added?

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4.3 Ratings (530 Votes)

1 The reaction of HOCl with water is as follows HOCl H2O H3O OCl H3O formed at equilibrium is responsible for the pH of the solution Lets find molarity of the solution now molarity moles of HOCl Liters of solution Moles of HOCl 1 mg 1 g1000 mg 1 mol 5246 g 1906 x 105 mol Molarity 1906 x 105 1 L 1906 x 105 M Lets draw ICE table for above equation HOCl H2O H3O OCl HOCl H2O H3O OCl I 1906 x 105 0 0 C x x x E 1906 x 105 x x x See Answer

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