Chemistry
Grade-9
Easy
Question
What is the percentage of chlorine available in the bleaching powder?
- 50
- 45
- 43.5
- 40
Hint:
The chemical formula of bleaching powder is Ca(OCl)2.
The correct answer is: 43.5
The chemical formula of bleaching powder is Ca(OCl)2.
Molecular mass of bleaching powder = (40 + 32 + 71)g = 143g. Atomic mass of calcium, oxygen, chlorine are 40g, 16g, 35.5 respectively.
The percentage of chlorine available in the bleaching powder = 71
143 = 49.65%
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