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According to the Cr(2)O(7)^(2-)+5H^(+)+3...

According to the `Cr_(2)O_(7)^(2-)+5H^(+)+3HNO_(2)` →`2Cr ^ (3+) +3NO_ (3)^(−)+4H_(2) O`
The rate of disappearance of `Cr_(2)O_(7)^(2-)` is found to be `2.4 xx10^(-4)` mol `L^(-1) S^(-1)` find the rate of appearance of `Cr^(3+)` during given time interval

A

`4.8 xx 10^(-40 mol L^(-1)s^(-1)`

B

`5.9 xx 10^(-4) mol L^(-1)s^(-1)`

C

`6.2 xx 10^(-4) mol L^(-1)s^(-1)`

D

`9.5 xx 10^(-4) mol L^(-1)s^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
The rate of diappearance of `Cr_(2)O_(7)^(2-)` is related to the rate of appearance of `Cr^(3+)` by the expression
`-(d[Cr_(2)O_(7)^(2-)])/(d t) = +(1)/(2)(d[Cr^(3+)])/(d t) rArr +(d[Cr^(3+)])/(d t) = 2 xx 2.4 xx 10^(-4) = 4.8 xx 10^(-4) mol L^(-1)s^(-1)`
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