A + B ----> C + D If [A] and [B] are both 0.100 M, then the rate of reaction is

ID: 816858 • Letter: A

Question

A + B ----> C + D

If [A] and [B] are both 0.100 M, then the rate of reaction is 0.0070 M/s.

(a) what is the rate of the reaction if [A] is doubled?

(b) starting with the original concentrations, what is the rate of the reaction if [B] is doubled?

(c) starting with the original concentrations, what is the rate of the reactions if [A] and [B] are both increased by a factor of four?

*the answers are not o.o14,0.014, or 0.112

A + B - C + D

rate of reaction r = [c][d]/[a][b]

0.007M/s = [c] [d] / [a] [b]

a.)if concentration of A is doubled r = ?

r* = [c] [d] / 2[a] [b]

r* =( [c] [d] / [a] [b] ) / 2

therefore r* = 2r = 0.007 * 2 = 0.014M/s

b.) similarly if [b] is doubled then it also gives the rate as 0.0014 M/s

c.)when [a] [b] increased by factor of 4 then rate of reaction = r * 16 = 0.007 * 16 =0.112M/s

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