# Which of the following solutions is a good buffer system? O A) a solution that is 0.10 M HC2H302 and 0.10 M LIC2H302 O B) a solution that is 0.10 M HF and 0.10 M NaC2H302 O c) a solution that is 0.10 M HCl and 0.10 M NH4+ OD) a solution that is 0.10 M NaOH and 0.10 M KOH

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## Question:

Which of the following solutions is a good buffer system? O A) a solution that is 0.10 M HC2H302 and 0.10 M LIC2H302 O B) a solution that is 0.10 M HF and 0.10 M NaC2H302 O c) a solution that is 0.10 M HCl and 0.10 M NH4+ OD) a solution that is 0.10 M NaOH and 0.10 M KOH

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The solution which is a good buffer system is:

(A) a solution that is 0.10 M     and 0.10 M

### What is a Buffer solution?

It is defined as a solution that maintain the pH of the solution by adding the small amount of acid or a base. It is mainly of two types:

Acidic buffer : It is defined as the solution that have the pH less than 7 and it contains weak acid and its salt or conjugate base. For example : Acetic acid (weak acid) and sodium acetate (salt or conjugate base). Basic buffer : It is defined as the solution that have the pH more than 7 and it contains weak base and its salt or conjugate acid. For example : Ammonia (weak base) and ammonium chloride (salt or conjugate acid).