Purchase Solution

The PCB concentration in Lake Michigan is declining accordin

Not what you're looking for?

Ask Custom Question

The PCB concentration in Lake Michigan is declining according to a first-order rate law having a rate constant of 0.050 per year. If the PCB concentration in Lake Michigan averaged 0.47 ppt in 1991, what will it be in 2005? In what year will the concentration fall to 0.10 ppt? What is the half-life period of PCBs in this lake? (Answer first with PCB concentration of the year 2005, then the year the concentration will be 0.10 ppt, and lastly the half-life).

Purchase this Solution

Solution Summary

The solution provides detailed explanations and answer for the half-life concentration problem.

Solution Preview

Please see attached file.

First-order rate laws:
(1)

Integrated form:
ln[A] = -kt + ln[A]o (2)

k = ...

Purchase this Solution


Free BrainMass Quizzes
General Chemistry - Classification of Matter

This test will assess your knowledge on the classification of matter which includes elements, compounds and mixtures.

Thermochemistry

The quiz helps in revising basic concepts about thermochemistry.

Functional groups in Organic Chemistry

You will be tested on the names of functional groups in Organic Chemistry. It is very important to know the functional groups to understand Organic reactions.

Organic Chemistry Naming: Alkanes

This is a quiz which is designed to assist students with learning the nomenclature used to identify organic compounds. This quiz focuses on the organic compounds called Alkanes.