Question

Assignment Score: 0% 01 45 - Hint Check Answer Question 10 of 20 > Using the data in the table, determine the rate constant of the reaction and select the appropriate units. A+2B+C+D Trial A (M) 0.340 0.340 0.680 B (M) Rate (M/s) 0.280 0.0112 0.560 0.0112 0.280 0.0448 Units

Answer 1

see experiment 1 and 3:
[A] doubles
[B] is constant
rate becomes 4 times
so, order of A is 2

see experiment 1 and 2:
[A] is constant
[B] doubles
rate is constant
so, order of B is 0

Rate law is:
rate = k*[A]^2

Put values from 1st row of table in rate law
rate = k*[A]^2
1.12*10^-2 = k*0.34^2
k = 0.0969 M-1.s-1

Answer: 0.0969 M-1.s-1