Hydrogen And Its Compounds Question 3
Question: The purity of $ H_2O_2 $ in a given sample is 85%. Calculate the weight of impure sample of $ H_2O_2 $ which requires 10 mL of $ M/5KMnO_4 $ solution in titration in acidic medium
Options:
A) 2 g
B) 0.2 g
C) 0.17 g
D) 0.15 g
Show Answer
Answer:
Correct Answer: B
Solution:
[b] $ mEqofMnO_4^{-}\equiv mEqofH_2{O_2} $
$ 10\times \frac{M}{5}\times 5\equiv mEqofH_2O_2 $
$ \Rightarrow 10mEq\equiv mEqofH_2O_2 $ Weight of $ H_2O_2=10\times {10^{-3}}\times \frac{34}{2}\times 0.17 $
$ =0.2g $ Weight of impure $ H_2O_2 $
$ =\frac{100}{85}\times 0.17=0.2g $
BETA
