Rate equations, rate constants and orders of reaction

Question 1

a first order reaction in relation to A is when

Answer 1

A has a direct proportion effect on the rate of reaction, so that when A is doubled, the rate of reaction also doubles

Question 2

a second order reaction in relation to B is when

Answer 2

B has a squared effect on the rate of reaction, so that when B is doubled, the rate of reaction increases by a factor of 4

Question 3

a zero order reaction in relation to C is when

Answer 3

C has not effect on the rate of reaction, o that when C is doubled, the rate of reaction does not change

Question 4

write a rate equation when A is first order, B is second and C is zero order

Answer 4

rate = k[A][B]2

we omit [C]0 as any integer to the power of 0 = 1, therefore has so effect on the calculation

Question 5

the units for each order of reaction are:
zero:
first:
second:
third:
fourth:

Answer 5

zero: mol dm-3 s-1
first: s-1
second: dm3 mol-1 s-1
third: dm6 mol-2 s-1
fourth: dm9 mol-3 s-1

Question 6

for a rate equation where the only component relevant is [A], k=

Answer 6

k= rate / [A]

so the unit is s-1

Question 7

for the reaction where
rate= k[A]m[B]n[C]p,
the overall rate of reaction is

Answer 7

n+m+p

add the powers

Question 8

the slowest step in a reaction is the

Answer 8

rate determining step