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Buffer Solutions

Which buffer ...

Question

Which buffer solution out of the following will have pH> 7?

C H_{3} C O O H + C H_{3} C O O N a

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H C O O H + H C O O K

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C H_{3} C O O N H_{4}

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N H_{4} O H + N H_{4} C l

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Solution

The correct option is D $N H_{4} O H + N H_{4} C l$
A solution that resists change in pH value upon addition of small amount of strong acid or base (less than 1 %) or when solution is diluted is called buffer solution.

Basic buffer solution : A basic buffer solution consists of a mixture of a weak base and its salt with strong acid. The best known example is a mixture of $N H_{4} O H$ and $N H_{4} C l .$

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