SATHEE: Qualitative Analysis - Result Question 4

Qualitative Analysis - Result Question 4

####4. In Carius method of estimation of halogens $250 m g$ of an organic compound gave $141 m g$ of $A g B r$ . The percentage of bromine in the compound is (atomic mass $A g = 108, B r = 80$ )

(a) 24

(b) 36

(c) 48

(d) 60

(2015 Main)

Show Answer

Answer:

Correct Answer: 4. (a)

Solution:

Given, Weight of organic compound $= 250 m g$

Weight of $A g B r = 141 m g$

$∴$ According to formula of $\%$ of bromine by Carius method

$\%$ of $B r = \frac{Atomic weight of B r}{Molecular weight of A g B r}$

$\begin{aligned} \times \frac{Weight of A g B r}{Weight of organic bromide} \times 100 \\ ∴ \% of B r = \frac{80}{188} \times \frac{141}{250} \times 100 & = \frac{1128000}{47000} = 24 \% \end{aligned}$

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Qualitative Analysis - Result Question 4

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