# 100 mL of ozone at STP was passed through 100 mL of 10 volume H_(2)O_(2) solution. What is the volume strength of H_(2)O_(2) after attract

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100 mL of ozone at STP was passed through 100 mL of 10 volume H_(2)O_(2) solution. What is the volume strength of H_(2)O_(2) after attraction?
A. 9.5
B. 9.0
C. 4.75
D. 4.5

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O_(3)toO_(2)+O....(i)
H_(2)O_(2)toH_(2)O+O....(ii)
O+OtoO_(2)......(iii)
1//2 vol ,1//2 vol ,1vol
100 mL of O_(3) at STP will produce will produce 100 mL of O_(2) as such and 100 mL of O_(2) after reaction with H_(2)O_(2). This new volume of 100 mL of molecular oxygen after reaction with H_(2)O_(2) is contributed equally by O_(3) and H_(2)O_(2). thus 50 mL of oxygen has been contributed by H_(2)O_(2).
Again, we know that
Volume of H_(2)O_(2)xx vol stre ngth of H_(2)O_(2)
=vol of O_(2) at STP
After utilisation of 50 mL of O_(2), according to Eq. (iii), the balance (1000-50)=950 mL of O_(2) at STP are still retainable by 100 mL of H_(2)O_(2). hence vol strength of H_(2)O_(2) after reaction
=("Volume of " O_(2) at STP)/("Volume of "H_(2)O_(2))
=950/100=9.5 V
:. volume strength =9.5