Question

Determine the rate law, including the values of the orders and rate law constant, for the following reaction using the experimental data provided.
A + B yields products
Trial [A] [B] Rate
1 0.15 M 0.12 M 1.3 × 10-2 M/min
2 0.30 M 0.12 M 2.6 × 10-2 M/min
3 0.15 M 0.24 M 5.2 × 10-2 M/min

Answer 1

All of the following are true for a catalyst except that it

provides an alternative pathway for a reaction.

increases the rate of a chemical reaction.

provides a lower required activation energy.

is consumed during a chemical reaction.

Answer 2

Your 2nd question..3 Of above seems to be correct about catalyst..Last one is false..

Answer 3

Determine the rate law, including the values of the orders and rate law constant, for the following reaction using the experimental data provided.
A + B yields products

Trial [A] [B] Rate
1 0.15 M 0.12 M 1.3 × 10-2 M/min
2 0.30 M 0.12 M 2.6 × 10-2 M/min
3 0.15 M 0.24 M 5.2 × 10-2 M/min

to determine the exponents in the rate law (m,j),

\[rate=k[A]^m[B]^j\]

you need to examine 2 situations (trials) where one of the species was held constant. For example, in trial 1 and 2:

[A] = 0.15M to [A]= 0.30 M, so we conclude [A] was doubled.
[B] = 0.12 M for both so it was held constant

in this situation we can ignore the effect of B on the rate and thus the rate law expression simplifies to:

\[rate=[A]^m\]

now look at the rate, in the same situation (trial 1 and 2). The rate doubled.

Trial 1: rate=1=1^m
Trial 2: rate=2=2^m

m=1

Since the rate doubled we can conclude that the exponent should be 1. (If the rate had quadrupled, the exponent would be 2.)

Now, do the same for [B].

Answer 4

@superhelp101

Answer 5

lolz a year ago! haha
i don't get this :/

Answer 6

O_o

Answer 7

do you?