The srength of H 2 O 2 is expressed in several ways like molarity- normality- - w - V - volume strength- etc- The strength of 10 V means 1 volume of H 2 O 2 on decomposition gives 10 volumes of oxygen at 1 atm and 273 K or 1 litre of H 2 O 2 gives 10 litre of O 2 at 1 atm and 273 K- The decomposition of H 2 O 2 is shown as under-H 2 O 2 aq - H 2 O l -1-2 O 2 g H 2 O 2 can acts as oxidising as well as reducing agent- as oxidisng agent H 2 O 2 converted into H 2 O and as reducing agent H 2 O 2 converted into O 2- both cases n-factor is 2 - Normality of H 2 O 2 Solution -2 - Molarity of H 2 O 2 Solution What is the percentage strength of 11-2 V H 2 O 2 -

1 litre of H_2O_2(aq) provide 11.2 L of O_2 at STP nbsp; Moles of O_2=1.222.4=0.5 n_H_2O_2 required=0.5× 2 nbsp; M_H_2O_2=n_H_2O_2V_solution=1 M Strength ...

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Standard XII

Chemistry

Normality

The srength o...

Question

The srength of $H_{2} O_{2}$ is expressed in several ways like molarity, normality, %(w/V), volume strength, etc. The strength of $10 V$ means 1 volume of $H_{2} O_{2}$ on decomposition gives 10 volumes of oxygen at 1 atm and $273 K$ or 1 litre of $H_{2} O_{2}$ gives $10 l i t r e$ of $O_{2}$ at 1 atm and $273 K$ .
The decomposition of $H_{2} O_{2}$ is shown as under:
$H_{2} O_{2} (a q) \to H_{2} O (l) + \frac{1}{2} O_{2} (g)$
$H_{2} O_{2}$ can acts as oxidising as well as reducing agent, as oxidisng agent $H_{2} O_{2}$ converted into $H_{2} O$ and as reducing agent $H_{2} O_{2}$ converted into $O_{2}$ , both cases n-factor is $2$ .
$∴, Normality of H_{2} O_{2} Solution = 2 \times Molarity of H_{2} O_{2} Solution$
What is the percentage strength of $11.2 V H_{2} O_{2}$ ?

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Solution

$1 l i t r e of H_{2} O_{2} (a q) provide 11.2 L of O_{2} at STP$
$Moles of O_{2} = \frac{1.2}{22.4} = 0.5 n_{H_{2} O_{2}} required = 0.5 \times 2 M_{H_{2} O_{2}} = \frac{n_{H_{2} O_{2}}}{V_{s o l u t i o n}} = 1 M$
$Strength in percentage means how many grams H_{2} O_{2} present per 100 mL$
$M = 1 and Molecular weight of H_{2} O_{2} = 34$
$∴ 34 g H_{2} O_{2} present per litre of solution or 3.4 g H_{2} O_{2} present per 100 mL of solution$ .

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Which of the following statements are correct for a solution of $H_{2} O_{2}$ having a strength of 17g/litre ?

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[Assume that the volume of

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[Given : Volume of

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Q. 44.8 V

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Solution (500 ml) when exposed to atmosphere looses 11.2 litre of

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In the reaction $A g_{2} O + H_{2} O_{2} \to 2 A g + H_{2} O + O_{2} . H_{2} O_{2}$ acts as :

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