1.

For an elementary reaction 2A+B to 3C the rate of disappearance of C at time t is 1.3xx10^(-4)"mol L"^(-1)s^(-1). Calculate atthis time (i) rate of the reaction. (ii) rate of disappearance of A.

Answer»

Solution :(i) Rate of the REACTION `= =(1)/(3)(d[C])/(dt)= +(1)/(3)xx1.3xx10^(-4)=4.33xx10^(-5)"mol L"^(-1)s^(-1)""…(1)`
(ii) Rate of disappearance of A
Rate of reaction `= -(1)/(2)` Rate of disappearance of A
or Rate of disappearance of A, `(d[A])/(dt)= -2xx` Rate or reaction
Substituting the value of rate of reaction from (1)
Rate of disappearance of `A=-2xx4.33xx10^(-5)"mol L"^(-1)s^(-1) `
`=-8.66xx10^(-5)"mol L"^(-1)s^(-1)`
`=8.66xx10^(-5)"mol L"^(-1)s^(-1)` (Ignoring the NEGATIVE sign)


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