When bleaching powder is added to water,its pH value
1 .increase
2.decrease
3.remain unaffected
4.depends on characteristic of water
Answers
Answered by
2
Bleaching powder is Calcium hypochlorite.
It is a mixture of : Ca(OH)₂, CaCl₂ and Ca(ClO)₂
In water the powder hydrolyses to hypoclorous acid and hydrochloric acid.
The solution formed is thus acidic.
Acidic solutions have lower pH than water.
Therefore :
When bleaching powder is added to water the pH decreases.
Answered by
2
The Bleaching powder is Ca(ClO)2 called calcium hypochlorite.
This powder form is a mixture of Ca(OH)2, CaCl2 and Ca(ClO)2.
In water the powder hydrolyses to hypochlorous acid, HOCl, which hydrolyses to HCl and reacts in advance to produce chlorine, the active chemical of bleaching powder.
The bleaching mechanism in dependent on the pH of the solution of the powder in water.
But generally when bleaching powder is added to water the pH decreases.
Similar questions