Question

When i'm calculating the rate law and rate constant of perhaps this reaction 2NO + Cl2 --> 2NOCl
Does the 2(moles) in front of the NO matter ? (im given the concentration for NO, Cl2 and the rate of reaction for three experiments and i have found that NO is 2.order reaction and Cl2 1.order)

Answer 1

when it comes to the rate orders, the answer is no: the stoichiometric coefficients do NOT have to match the rate orders

Answer 2

ok thank you :) i was just wondering because i got: k = 2.27*10^-5 M/s / ((0.0125 M)^2 (0.0255)) = 5.7 when the right answere is 5.7 *10^-2

Answer 3

Expt Initial [NO], M Initial [Cl2], M Initial Rate of Reaction, M s*1
1 0.0125 0.0255 2.27 * 10-5
2 0.0125 0.0510 4.55 * 10-5
3 0.0250 0.0255 9.08 * 10-5

Isnt it right that NO has 2.order and Cl2 1.order ?

Answer 4

that's what the data looks like to me