Which of the following mixtures will result in the formation of a buffer solution when dissolved in 1.00 L of water?

i) 0.50 mol HClO2 and 0.25 mol HCl.
ii) 0.50 mol HClO2 and 0.25 mol NaOH.
iii) 0.50 mol NaClO2 and 0.50 mol HClO2.
iv) 0.50 mol NaClO2 and 0.50 mol HCl.

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  1. Buffers are composed of a weak acid and its salt OR a weak base and its salt.
    ii will do it. NaOH reacts with HClO2 to form NaClO2 and there is some HClO2 un-reacted. That makes a weak acid and its salt. iii is a salt and the weak acid.

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  2. Thanks a lot!

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  3. We assign these questions for you to complete individually, in order to broaden your knowledge of chemistry... NOT to ask a qualified Doctor for the answer.

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