Question

$0.40$ g of an iodo substituted organic compound by Carius method gave $0.235$ g of silver iodide. Calculate the percentage of iodine in the compound.

• A. $36.55$%
• B. $30$%
• C. $31.75$%
• D. $42.5$%

Answer 1

Answer: (C)

$31.75$%

According to Carius determination method,

$\%$ of $I=\frac{127}{108+127}\times \frac{MassofAgI}{Massoforganiccompound}\times 100$

$⟹\%$ of $I=\frac{127}{108+127}\times \frac{0.235}{0.40}\times 100$

$⟹\%$ of $I=0.54\times \frac{0.235}{0.40}\times 100$

$⟹\%$ of $I=31.75\%$