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  • The strength of 11.2 volume solution of is -<st

The strength of 11.2 volume solution of \mathrm{H_{2}O_{2}} is -

Option: 1

34%


Option: 2

13.6%


Option: 3

3.4%


Option: 4

1.7%


Answers (1)

best_answer

11.2 volume of  \mathrm{H}_2 \mathrm{O}_2 means that 1 \mathrm{ml} of this \mathrm{\mathrm{H}_2 \mathrm{O}_2} will give 11.2 ml of \mathrm{\mathrm{O}_2}

\mathrm{2 \mathrm{H}_2 \mathrm{O}_2 \longrightarrow \mathrm{O}_2+2 \mathrm{H}_2 \mathrm{O}}

22.4 \mathrm{~L}  of \mathrm{O}_2  at STP is produced from \mathrm{H}_2 \mathrm{O}_2=68 \mathrm{~g}

\mathrm{\therefore 11.2 \mathrm{~L} \: of \: \mathrm{O}_2} at STP is produced from, \mathrm{\mathrm{H}_2 \mathrm{O}_2=\frac{68}{22.4} \times 11.2=34 \mathrm{~g}}

\mathrm{\therefore 34 \mathrm{~g} \: of \: \mathrm{H}_2 \mathrm{O}_2} is present in \mathrm{1000 \mathrm{~g}} of solution,\mathrm{%w/w=\frac{34}{1000} \times 100 }

                                                                                            =3.4%

Hence option 3 is correct.

 

Posted by

Suraj Bhandari

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