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 &#160; mL solution containing 0 . 2 &#160; g impure H 2 O 2 reacts completely with 0 . 316 &#160; 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 )

Aicharya · Accepted Answer

Let mass of pure H 2 O 2 is x gram + 7 MnO 4 &#8722; &#8201;&#8201; + &#8201;&#8201; &#8722; 1 H 2 O 2 vf = 2 &#8201;&#8201;&#8201; &#8594; &#8201;&#8201;&#8201; + 2 Mn 2 + &#8201; + &#8201;&#8201; 0 O 2 Eq. of H 2 O 2 = Eq . of MnO 4 - x 34 2 = 0 .316 158 &#160; 5 x = 0 . 17 So, % purity of H 2 O 2 solution = 0 .17 0 .2 &#215; 100 = 85 %

A 20 . 0   mL solution containing 0 . 2   g impure H 2 O 2 reacts completely with 0 . 316   g…

Solution

A 20 . 0 &#160; mL solution containing 0 . 2 &#160; g impure H 2 O 2 reacts completely with 0 . 316 &#160; g…

Solution

A 20 . 0 mL solution containing 0 . 2 g impure H 2 O 2 reacts completely with 0 . 316 g…