A solution containing which one of the following pairs of substances will be a buffer solution?
A) RbCl, HCl
B) KBr, HBr
C) CsF, HF
D) NaI, HI
E) none of the above

Respuesta :

Answer:

C) CsF, HF

Explanation:

  • A buffer is a solution that resists change in PH. It usually has a weak acid, and a base.
  • In this case; CsF , HF   would make a buffer solution  such that; HF is a weak acid and F- is its conjugate base

A solution containing CsF and HF pairs of substances will be a buffer solution.

What are buffer solution?

Buffer solutions are formed by the mixture of weak acid and its conjugate base or by weak base and its conjugate acid, and helps to retain the pH of the solution if any strong acid or base is added in small quantity.

Among the given pairs all pairs will form buffer solution except CsF and HF, because HF is a weak base and F⁻ is conjugate base of HF acid.

Hence, option (c) is correct i.e. CsF and HF.

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