Molarity and the pH Value of Acid or Alkali

user

12 years ago

The table below shows the pH value and the molarity of a strong acid and a weak acid.
Molarity of Acids
pH value
Hydrochloric acid
Ethanoic Acid
0.1 mol dm^-3
1.0
2.9
0.01 mol dm^-3
2.0
3.4
0.001 mol dm^-3
3.0
3.9
0.0001 mol dm^-3
4.0
4.4
0.00001 mol dm^-3
5.0
4.9
The table below shows the pH value and the molarity of a strong alkali and a weak alkali.
Molarity of alkali
pH value
Sodium hydroxide solution
Ammonia aqueous
0.1 mol dm^-3
13.0
11.1
0.01 mol dm^-3
12.0
10.6
0.001 mol dm^-3
11.0
10.1
0.0001 mol dm^-3
10.0
9.6
0.00001 mol dm^-3
9.0
9.1
According to the tables shown above, we can conclude that the pH value of acid or alkali is affected by 2 factors: