For the reaction A + B + C → products,the following initial-rate data were obtained.
[A]₀ (mol/L)
[B]₀ (mol/L)
[C]₀ (mol/L)
Initial Rate (mol/(L ∙ s) )
0) 40
0) 40
0) 20
0) 0160
0) 20
0) 40
0) 40
0) 0080
0) 60
0) 10
0) 20
0) 0015
0) 20
0) 10
0) 20
0) 0005
0) 20
0) 20
0) 40
0) 0020
What are the reaction orders with respect to A,B,and C,respectively?

Question

Quizplus · Accepted Answer

The reaction order can be determined by analyzing how the initial rate changes with the concentration of each reactant while keeping the other reactants' concentrations constant. For reactant A, comparing experiments 1 and 2 (or 3 and 4) shows that when [A] doubles, the rate doubles, indicating a first-order dependence on A. For B, comparing experiments 1 and 3 (or 2 and 4) shows that when [B] doubles, the rate quadruples, indicating a second-order dependence on B. For C, comparing experiments 1 and 5 shows that when [C] doubles, the rate does not change, indicating a zero-order dependence on C. Therefore, the reaction orders with respect to A, B, and C are 1, 2, and 0, respectively.

For the Reaction a + B + C → Products,the