What mass of hydrogen peroxide will be present in 2 litres of a 5 molar solution? Calculate the mass of oxygen which will be liberated by the decomposition of 200 mL of this solution.
What mass of hydrogen peroxide will be present in 2 litres of a 5 molar solution? Calculate the mass of oxygen which will be liberated by the decomposition of 200 mL of this solution.
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1 Answer
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This is a long answer type question as classified in NCERT Exemplar
Mass of H2O2 = 68 g.
Mol. Mass of H2O2=34gmol-1
∴1L of M solution of H2O2 will contain H2O2=34×5 g
∴2L of 5 M solution will contain H2O2=34×5×2=340g
or 200 mL of 5 solution will contain H2O2 = 200 = 34 g
Now 2H2O2 → 2H2O+O2
64 g 32g
Now 68 g of H2O2 on decomposition will give O2=32g
∴34g of H2O2 on decomposition will give O2 = 34 =16 g
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Compound Melting Point (K)
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HI
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