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26 November, 10:40

20 ml of a 1.0 m hcl solution are added to 3.0 l of acid solution with a ph of 5.35. the ph of the mixture rises to 5.33 was the initial 3.0 l solution a buffered solution?

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  1. 26 November, 10:57
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    You may suppose you have a 0.1 M solution of NH3, from:

    NH4Cl + NaOH > NH3 + H2O.

    Then you can compute the pH from the concentration of NH3 and its pKb.

    The concentration is high enough to use the simplified formula:

    [OH] = sqr (Kb*conc)
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