Question

# Which of the following will produce a buffer solution when mixed in equal volumes?

A
0.1mol dm3 NH4OH and 0.1mol dm3 HCl.
B
0.05mol dm3 NH4OH and 0.1mol dm3 HCl.
C
0.1mol dm3 NH4OH and 0.05mol dm3 HCl.
D
0.1mol dm3 CH4COONa and 0.1mol dm3 NaOH.

Solution

## The correct option is C $$0.1 mol\ dm^{-3}$$ $$NH_{4}OH$$ and $$0.05 mol\ dm^{-3}$$ $$HCl$$.$$0.1 mol\ dm^{-3}$$ $$NH_{4}OH$$ and $$0.05 mol\ dm^{-3}$$ $$HCl$$.As a mixture of ammonium chloride and ammonium hydroxide acts as a buffer around pH $$9.25$$.Chemistry

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