Environmental Chemistry HW Solutions
Environmental Chemistry, Ninth Edition, Answer Manual 13 CHAPTER 3 FUNDAMENTALS OF AQUATIC CHEMISTRY QUESTIONS AND PRO
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Environmental Chemistry, Ninth Edition, Answer Manual
13
CHAPTER 3 FUNDAMENTALS OF AQUATIC CHEMISTRY QUESTIONS AND PROBLEMS 1. Alkalinity is determined by titration with standard acid. The alkalinity is often expressed as mg/L of CaC0 3 . If V p mL of acid of normality N are required to titrate V s mL of sample to the phenolphthalein endpoint, what is the formula for the phenolphthalein alkalinity as mg/L ofCaC0 3 ?
Answer: (V p x N)/V s 2. Exactly 100 pounds of cane sugar (dextrose), C 12 H 22 0 11 , were accidentally discharged into a small stream saturated with oxygen from the air at 2Ye. How many liters of this water could be contaminated to thc extent of removing all the dissolved oxygen by biodegradation?
A
Answer: The calculation is the following, where Dx is dextrose
/~-:J-
.