A = B = C = .5M initial rate 1.5x10^-4 orders are 2, 0, 1 respectively. what is the rate constant. I got 1.2x10^-3 M^-2s^-1, but its wrong?
回答 (1)
2016-06-19 4:56 pm
The orders with respect to A, B and C are 2, 0 and 1 respectively.
Then, Rate = k [A]² [C]
When [A] = [C] = 0.5 M, Rate = 1.5 × 10⁻⁴ M s⁻¹ :
1.5 × 10⁻⁴ M s⁻¹ = k (0.5 M)² (0.5 M)
k = (1.5 × 10⁻⁴ M s⁻¹) / (0.5 M)³
Rate constant, k = 1.2 × 10⁻⁴ M⁻² s⁻¹
(Your answer is correct.)
Then, Rate = k [A]² [C]
When [A] = [C] = 0.5 M, Rate = 1.5 × 10⁻⁴ M s⁻¹ :
1.5 × 10⁻⁴ M s⁻¹ = k (0.5 M)² (0.5 M)
k = (1.5 × 10⁻⁴ M s⁻¹) / (0.5 M)³
Rate constant, k = 1.2 × 10⁻⁴ M⁻² s⁻¹
(Your answer is correct.)
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