25 mL of 0.50 M H2O2 solution is added to 50 mL of 0.20 M KMnO4 in acid solution. Which of the following statements is true?

Question

25 mL of 0.50 M H2O2 solution is added to 50 mL of 0.20 M KMnO4 in acid solution. Which of the following statements is true? (A) 0.010 mole of oxygen is liberated (B) 0.005 mole of KMnO4 are left (C) 0.030 g atom of oxygen gas is evolved (D) 0.0025 mole H2O2 does not react with KMnO4

Tardigrade Admin · Accepted Answer

M eq. of KMnO4 = .2 × 50 × 5 = 50 M eq. of H2O2 = 2 × 25 × .5 = 25 M eq. of KMnO4 remaining = (50 - 25) = 25 Mole of KMnO4 =(25/5) × 10-3 =5 × 10-3 =.005

Q. $25 m L$ of $0.50 M H_{2} O_{2}$ solution is added to $50 m L o f 0.20 M K M n O_{4}$ in acid solution. Which of the following statements is true?

$0.010$ mole of oxygen is liberated

$0.005$ mole of $K M n O_{4}$ are left

$0.030$ g atom of oxygen gas is evolved

$0.0025$ mole $H_{2} O_{2}$ does not react with $K M n O_{4}$

M eq. of $K M n O_{4} = .2 \times 50 \times 5 = 50$
M eq. of $H_{2} O_{2} = 2 \times 25 \times .5 = 25$
M eq. of $K M n O_{4}$ remaining $= (50 - 25) = 25$
Mole of $K M n O_{4} = \frac{25}{5} \times 1 0^{- 3} = 5 \times 1 0^{- 3} = .005$

Q. 25mL of 0.50MH2​O2​ solution is added to 50mLof0.20MKMnO4​ in acid solution. Which of the following statements is true?

0.010 mole of oxygen is liberated

0.005 mole of KMnO4​ are left

0.030 g atom of oxygen gas is evolved

0.0025 mole H2​O2​ does not react with KMnO4​