Question

34. The addition of solid sodium carbonate to pure water
causes
Na, .. .
(1) An increase in the hydronium ion concentration
(2) An increase in pH
(3) No change in pH
(4) A decrease in the hydroxide ion concentration​

Answer 1

Answer:

Increases the pH and takes it to Basic strength

Answer 2

Answer:

(2) an increase in pH

Explanation:

• Sodium Carbonate is a basic salt.
• It is formed by the combination of a weak acid (Carbonic Acid) and a strong base (Sodium Hydroxide).
• Adding solid sodium Carbonate increases the basicity of water.
• Hydroxide ion concentration increases in water.
• pH becomes greater than 7.
• Hence there is an increase in pH.