Acid And Bases

Question 1

Acid are …. And when they react with water they form ……

Answer 1

Acids are proton donors and when they react with water they form hydroxonium ions

Question 2

Bases are …..and when they react with water they form…

Answer 2

Proton acceptors and hydroxide ions

Question 3

Strong bases + acids … while weak acids + bases ….

Answer 3

Strong bases + acids dissociate (ionise) almost completely while weak acids + bases dissociate partially

Question 4

Give examples of strong acids + bases to remember

Answer 4

Acids:
Hydrochloric acid
Sulfuric acid
Nitric acid

Bases:
Sodium hydroxide
Potassium hydroxide

Question 5

What is the kc equation give the kw expression of water

Answer 5

Products/ reactants

Kw= [H+] [OH-] kw has units of mol2dm-6

Question 6

The value of kw is the … in a given temperature.

What is kw at a given temperature?

Answer 6

Same

1 x 10-14 mol2dm-6

Question 7

Equation for ph

Answer 7

pH= -log10 [H+]

Question 8

Calculate the pH of 0.03 moldm-3 of hydrochloric acid.

Answer 8

-log 10 [H+] = 1.52

Question 9

Equation to calculate the concentration of a substance when given the pH

Answer 9

10-pH

Question 10

Calculate the concentration of hydrogen ions with nitric acid with a ph of 1.7

Answer 10

10^-1.7 = 0.02 moldm-3