1.

Three solutions eaach of 100 mL containing 0.4 M As_(2)S_(3),5M NaOH and 6MH_(2)O_(2), respectively were mixed to form AsO_(4)^(3-) and SO_(4)^(2-) as products. Q. Percentage strength of the H_(2)O_(2) solution left after reaction is

Answer»

`0.017%`
`0.113%`
`0.51%`
`0.68%`

SOLUTION :`M of H_(2)O_(2)` left`=(2M)/(15)`
`N of H_(2)O_(2)` left`=(2XX2)/(15)=(4)/(15)N`
`1N of H_(2)O_(2)=(1eq)/(L)H_(2)O_(2)=5.6V`
(Volume STRENGTH)`=1.7%`
`(4)/(15)NH_(2)O_(2)=1.7xx(4)/(15)=0.452%`


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