5.1.10 Acids and Bases

Question 1

What does the numerical value of Kc tell you about the position of the equilibrium?

Answer 1

Equilibrium lies to the right.

Question 2

Define an acid.

Answer 2

Proton donor.

Question 3

Define a base.

Answer 3

Proton acceptor.

Question 4

Define a strong acid.

Answer 4

Dissociates 100% in aqueous solution.

Question 5

Define a weak acid.

Answer 5

Only partially dissociates in aqueous solution.

Question 6

How do you work out Ka?

Answer 6

10^-pKa

Question 7

What happens when an acid is added to water?

Answer 7

The acid dissociates releasing H+ ions into solution.

Question 8

What needs to happen for proton transfer to take place?

Answer 8

Water must be present, so that water can accept the H+ from its conjugate acid.

Question 9

Define a strong monobasic acid.

Answer 9

Completely dissociates in solution.

Question 10

If a strong monobasic acid completely dissociates in solution, why does this then help us work out the pH value?

Answer 10

Because this means that the concentration of H+ is equal to the concentration of the acid and this can be used to calculate the pH value.