A 20.0 mL solution containing 0.2 g impure H 2 O 2 reacts completely with 0.316 g of KMnO 4 in acid solution. The purity of H 2 O 2 (in %) is .(mol. wt. of H 2 O 2=34 ; mol. wt. of . KMnO 4=158)

Question

A 20.0 mL solution containing 0.2 g impure H 2 O 2 reacts completely with 0.316 g of KMnO 4 in acid solution. The purity of H 2 O 2 (in %) is .(mol. wt. of H 2 O 2=34 ; mol. wt. of . KMnO 4=158) (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

Eq of H 2 O 2= Eq of KMnO 4 x × 2=(0.316/158) × 5 x=5 × 10-3 mol m H 2 O 2=5 × 10-3 × 34=0.17 gm % H 2 O 2=(0.17/0.2) × 100=85

Q. A $20.0 m L$ solution containing $0.2 g$ impure $H_{2} O_{2}$ reacts completely with $0.316 g$ of $K M n O_{4}$ in acid solution. The purity of $H_{2} O_{2}$ (in \%) is _______.(mol. wt. of $H_{2} O_{2} = 34;$ mol. wt. of $K M n O_{4} = 158)$

Eq of $H_{2} O_{2} = Eq$ of $K M n O_{4}$

$x \times 2 = \frac{0.316}{158} \times 5$

$x = 5 \times 1 0^{- 3} m o l$

$m_{H_{2} O_{2}} = 5 \times 1 0^{- 3} \times 34 = 0.17 g m$

$% H_{2} O_{2} = \frac{0.17}{0.2} \times 100 = 85$

Q. A 20.0mL solution containing 0.2g impure H2​O2​ reacts completely with 0.316g of KMnO4​ in acid solution. The purity of H2​O2​ (in \%) is _______.(mol. wt. of H2​O2​=34; mol. wt. of KMnO4​=158)

Eq of H2​O2​=Eq of KMnO4​ x×2=1580.316​×5 x=5×10−3mol mH2​O2​​=5×10−3×34=0.17gm %H2​O2​=0.20.17​×100=85

Q. A $20.0 m L$ solution containing $0.2 g$ impure $H_{2} O_{2}$ reacts completely with $0.316 g$ of $K M n O_{4}$ in acid solution. The purity of $H_{2} O_{2}$ (in \%) is _______.(mol. wt. of $H_{2} O_{2} = 34;$ mol. wt. of $K M n O_{4} = 158)$

Eq of $H_{2} O_{2} = Eq$ of $K M n O_{4}$

$x \times 2 = \frac{0.316}{158} \times 5$

$x = 5 \times 1 0^{- 3} m o l$

$m_{H_{2} O_{2}} = 5 \times 1 0^{- 3} \times 34 = 0.17 g m$

$% H_{2} O_{2} = \frac{0.17}{0.2} \times 100 = 85$