# Streamline - Winter 2012 - (Page 31)

Wastewater Math QUESTIONS 1. a. b. c. d. Find the total head, in feet, for a pump with a total static head of 15 feet and a head loss of 2.8 feet. 12.2 feet 17.8 feet 42 feet 5.4 feet A 40 foot-extension ladder reaches the top of a clarifier when the bottom end rests 16 feet from the side of the tank. What is the height of the clarifier? 2. 7. a. b. c. d. The number of moles of solute per liter of solution is known as ________________. molecular weight normality molarity capacity 8. 3. 4. 5. a. b. c. d. What is the slope of the ladder? The distance around a circular pond is 2.5 miles. How many surface acres are in the pond? a. b. c. d. What is the molarity of a 1000 ml solution in which 325 grams of NaCl dissolved? Note: atomic weight of sodium is 22.99 and the atomic weight of chlorine is 35.45. 58.44 M 3.25 M 1.0 M 5.56 M Basic Chemistry 9. a. b. c. d. The two parts of a solution are a solvent and a _____________. Chemical Salt Compound Solute Normality is defined as _______________________. the number of equivalent weights of solute per liter of solution the day to day operations of a certified lab the square root of an equivalent weight the opposite of chaos 6. a. b. c. d. The percent strength of a solution can be expressed as percent by ________ or ________. age, maturity weight, volume strength, concentration color, clarity 10. If 28 mL of a 0.2 N solution of acetic acid is needed to neutralize 40 mL of a base solution, what would the normality of the base solution have to be? a. 1.0 N b. 1.4 N c. .14 N d. .04 N www.vrwa.org 31 http://www.vrwa.org

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