{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

ENV_4001_hw2

# ENV_4001_hw2 - ENV 4001 Environmental Systems Engineering...

This preview shows pages 1–2. Sign up to view the full content.

ENV 4001: Environmental Systems Engineering Spring 2010 University of South Florida Homework #2 Civil & Environmental Eng. Due Wed., Jan. 27, 2010 Prof. J. A. Cunningham Each homework assignment will be graded on a 100-point scale. For this assignment, each of the five problems is worth 20 points. (1) (a) Answer problem 3-6 in your text book. Hint #1: the total mass of TCE in the vial after the system equilibrates is equal to the total mass of TCE in the system when it is first introduced. Hint #2: the mass of TCE in the water is equal to the volume of the water times the concentration of TCE in the water. (b) Answer problem 3-12 in your text book. Hint: notice that the requirement is 1 mg/L of P, not 1 mg/L of PO 4 3 - . What would be the corresponding concentration of PO 4 3 - ? (2) For this problem you may assume a temperature of 25 C. (a) A water contains 40 mg/L of Mg 2+ . We want to reduce the concentration of Mg 2+ in the water, so we raise the pH to 11. What will be the concentration of magnesium ion at that point? Report your answer in units of mg/L. You may assume that the

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 3

ENV_4001_hw2 - ENV 4001 Environmental Systems Engineering...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online