A sample of H2O2 solution labelled as 28 volume has density of 265 g/L. Mark the correct option(s) representing concentration of same solution in other units.
A
Molarity of H2O2=2.5
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B
Percentage w/v=17
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C
Mole fraction of H2O2=0.2
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D
Molality of H2O2=13.88
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Solution
The correct options are A Molarity of H2O2=2.5 C Mole fraction of H2O2=0.2 D Molality of H2O2=13.88
Volume strength is 28. Molarity is volume strength11.2=2811.2=2.5.
Percentage w/v is volume strength×6822.4=28×68224=8.5.
1 L of solution contains 2.5 moles of hydrogen peroxide.
Number of moles of water =265g/L×1L−2.5mol×34g/mol18=10 moles