First slide

Hydrogen Peroxide

Question

20 volumes H₂O₂ solution has a strength of about

Difficult

Solution

${∵ 22.4 litres O}_{2} at N . T . P . obtained by 68 g of H_{2} O_{2}$
${∵ 1 litre O}_{2} at N . T . P . obtained by \frac{68}{22.4} g of H_{2} O_{2}$
$∴ {20 litre O}_{2} at N . T . P . obtained by \frac{68}{22.4} × 20 g of H_{2} O_{2} = 60.71 g of H_{2} O_{2}$
$∴ 1000 m l O_{2} a t N . T . P . o b t a i n e d b y 60.71 g o f H_{2} O_{2} = 60.71 g o f H_{2} O_{2}$
$∴ 100 m l O_{2} a t N . T . P . o b t a i n e d b y = \frac{60.71}{1000} × 100 = 6.71 %$

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