General Organic Chemistry Question 4
Question 4 - 25 January - Shift 1
In sulphur estimation. $0.471 g$ of an organic compound gave $1.4439 g$ of barium sulphate.
The percentage of sulphur in the compound is (Nearest Integer)
(Given: Atomic mass Ba: 137 u: S: 32 u, O: 16 u )
Show Answer
Answer: (42)
Solution:
Formula: Mole-Mole Concept
$%$ sulphur $=\frac{32}{233} \times \frac{\text{ weight of } BaSO_4 \text{ formed }}{\text{ weight of organic compound }} \times 10$
$=\frac{32}{233} \times \frac{1.4439}{0.471} \times 100$
$=42.10$
Nearest integer 42
