Buffers Quiz 1

Question 1

Among the following choose the correct option that defines the acidic buffer solution:

Accepted Answer

Solution with weak acid and conjugate base

Answer

Solution with strong acid and weak acid

Answer

Solution with weak acid and strong base

Answer

Solution with strong acid and conjugate base

Question 2

What will be the value of pH for a simple buffer solution?

Accepted Answer

$$pH=7+\dfrac{1}{2}p{{K}_{a}}-\dfrac{1}{2}p{{K}_{b}}$$

Answer

$$pH=7+\dfrac{1}{2}{{K}_{b}}-\dfrac{1}{2}{{K}_{a}}$$

Answer

$$pH=\dfrac{1}{2}p{{K}_{a}}+\dfrac{1}{2}p{{K}_{b}}$$

Answer

$$pH=7-\dfrac{1}{2}p{{K}_{a}}+\dfrac{1}{2}p{{K}_{b}}$$

Question 3

In a simple buffer solution the pH value doesn't depend on which of the given properties:

Accepted Answer

Concentration

Answer

Volume of the solution

Answer

Temperature

Answer

Conjugate base

Question 4

According to Henderson's equation the value of the $$pOH$$ of basic buffer solution depends on:

Accepted Answer

$$p{{K}_{b}}$$ of base and ratio of conjugate acid to a base concentration

Answer

$$p{{K}_{a}}$$ of acid and ratio of proton acceptor to proton donor

Answer

$$p{{K}_{b}}$$ of base and ratio of conjugate base to base concentration

Answer

$$p{{K}_{a}}$$ of acid and ratio of salt to base concentration

Question 5

In the question, the concentration of   $$C{{H}_{3}}COONa\, and\,C{{H}_{3}}COOH$$  is given in the ratio of $$2:10$$ and the value of ionization constant for a weak acid is given as $${{10}^{-12}}$$. Find the pOH of this buffer solution:

Accepted Answer

3

Answer

2

Answer

5

Answer

4