NCERT Class XII Chemistry <br> Chapter - Solutions <br> Questions with Solutions

NCERT Class XII Chemistry
Chapter - Solutions
Questions with Solutions

Question : 42

Total: 53

Intext Questions

Calculate the mass percentage of benzene (C6H6) and carbon tetrachloride (CCl4) if 22 g of benzene is dissolved in 122 g of carbon tetrachloride.

Solution:

Mass of solution = Mass of benzene + Mass of carbon tetrachloride
= 22 g + 122 g = 144 g
Mass‌percentage‌of‌benzene =

‌Mass‌of‌benzene

Mass‌of‌solution

×100
=

22 g

144 g

×100=15.28%
∴ Mass percentage of CCl4 = 100 – Mass percentage of benzene
=100−15.28=84.72%

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