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10 December, 11:11

An aqueous solution contains 0.30 M nitrous acid. One Liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.) A. 0.31 mol NaNO2 B. 0.074 mol Ca (OH) 2 C. 0.31 mol HI D. 0.30 mol NaBr E. 0.15 mol HI

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  1. 10 December, 15:08
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    A. 0.31 mol NaNO2

    Explanation:

    Buffer solutions are the solutions that resist changes in pH on addition of small amount of acid or base.

    Buffer solutions usually contain the mixture of a weak acid and its salt, or a weak base and its salt.

    Among the options listed in the question, only NaNO2 is the salt formed from the nitrous acid.
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