Consider a reaction involing two reactants (A and B) in which the reaction is fi

Question

Consider a reaction involing two reactants (A and B) in which the reaction is first-order in reactant A and second-order in reactant B.

a. write the rate law for the reaction.   k [A] [B]^2

b. overall rate order= 3

c.  Identify how the reaction rate would change if...

i. [A] is doubled and [B] is held constant?   Reaction rate will double.

ii. [A] is held constant and [B] is doubled?  Reaction rate is quadrupled.

iii.  [A] is tripled and [B] is doubled?

iv.  [A] is doubled and [B] is halved?

d.  When graphing a log-log plot to determine the order of each reactan, how do you determine which data points to plot?

I know this is probably basic, but i'm having difficulty figuring it out and when I plug in hypotheical numbers, i keep getting different answers.  help!

Explanation / Answer

c) i)

rate of the reaction becomes double

ii)

rate of the reaction becomes 4 times

iii)

rate of the reaction becomes 12 times

iv)

rate of the reaction becomes 1/2 of the initial

d) if we take two reactents we cant draw log- log graph

only it is possible when one reactent is kept constant

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