The first-order rate constant for the decomposition of a certain insecticide in water at 12°C is 1.45 yr⁻¹. A quantity of this insecticide is washed into a lake on June 1, leading to a concentration of 5.0 × 10⁻⁷ g/cm³ of water. Assume that the effective temperature of the lake is 12°C.(a) What is the concentration of the insecticide on June 1 of the following year?(b) How long will it take for the concentration of the insecticide to drop to 3.0 × 10⁻⁷ g/cm³?

(a) integrated rate law is given by ln ([A]0[A]t) = k t

The first-order rate constant for the decomposition of a certain insecticide in water at 12°C is 1.45 yr. A quantity of this insecticide is washed into a lake on June 1, leading Encentration of 5.0 × 10 g/cm’of water. Assume that the effective temperature the lake is 12°C. (a) What is the concentration of the insecticide on June 1 of the fol- Inving year? (b) How long will it take for the concentration of the insecticide to drop to 3.0 X 10g/cm³?

The first-order rate constant for the decomposition of a certain insecticide in water at 12°C is 1.45 yr. A quantity of this insecticide is washed into a lake on June 1, leading Encentration of 5.0 × 10 g/cm’of water. Assume that the effective temperature the lake is 12°C. (a) What is the concentration of the insecticide on June 1 of the fol- Inving year? (b) How long will it take for the concentration of the insecticide to drop to 3.0 X 10g/cm³?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

The first-order rate constant for the decomposition of a certain insecticide in water at 12°C is 1.45 yr⁻¹. A quantity of this insecticide is washed into a lake on June 1, leading to a concentration of 5.0 × 10⁻⁷ g/cm³ of water. Assume that the effective temperature of the lake is 12°C.

(a) What is the concentration of the insecticide on June 1 of the following year?

(b) How long will it take for the concentration of the insecticide to drop to 3.0 × 10⁻⁷ g/cm³?

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