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Organic Chemistry – Some Basic Principles And Techniques

Question
CBSEENCH11007643

In Carius method of estimation of halogen, 0.15 g of an organic compound gave 0.12 g of AgBr. Find out the percentage of bromine in the compound. 

Solution

Mass of organic compound 0.15g
Mass of AgBr = 0.12g
Molecular mass of AgBr = 108+80 = 188 g mol-1
Now 188g AgBr contains 80 g bromine
space space therefore space 0.12 straight g space AgBr space would space contain space 80 over 188 cross times 0.12 space bromine
space space space space equals space 0.05 space bromine
space space therefore space space space space Percentage space of space bromine space equals space fraction numerator 0.05 over denominator 0.15 end fraction cross times 100
space space space space space space space equals space 33.3 percent sign