# 4.2     For the reaction:                        the rate = with . Calculate the initial rate of the reaction when. Calculate the rate of reaction after  is reduced to .

The initial rate of reaction =

substitute the given values of [A], [B] and k,

rate  =

=8

When [A] is reduced from 0.1 mol/L to 0.06 mol/L

So, conc. of A reacted = 0.1-0.06 = 0.04 mol/L

and conc. of B reacted = 1/2(0.04) = 0.02mol/L

conc. of B left = (0.2-0.02) = 0.18 mol/L

Now,  the rate of the reaction is (R) =

=

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