) You have water contaminated with phosphates bacteria and pentachlorophenol. Which of these water treatment(s) could you use to treat this contaminated water?
a. addition of calcium hydroxide followed by filtration
b. addition of sulfuric acid
c. UV treatment
d. addition of HOCl
2.)Please match each phrase to each of the three different types of disinfection technologies.
[ ] Has residual disinfection power
[ ] Doesnt work well with water containing particulates
[ ] Although it is a chemical treatment it leaves no after taste
[ ] Very unstable oxidizing agent oxidizes bacteria and viruses
[ ] Most inexpensive
[ ] Quick portable and no chemicals involved
a. HOCl treatment
b. Ozone treatment
c. UV light treatment
3.)Use the appropriate physical or chemical parameter provided to complete the following sentences.
[ ] The ______ is an important indicator of flammability.
[ ] The _______ determines the corrosiveness of the material.
[ ] ___________ can be used to infer whether the chemical can be inhaled as well as how readily it will spread in our atmosphere.
[ ] The ________ value can be used to predict the ability of a chemical to a bioaccumulate.
a. log Kow
b. water solubility
c. vapor pressure
d. flash point
e. boiling point
f. pH
4.) Which of the following reasons explains the lack of any pictures of the garbage patches in our oceans?
a. there are no garbage patches
b. the reflectivity of the majority of the garbage plastics is very similar to that of water so it is difficult to distinguish between plastics and water.
c. much of the garbage/plastics are tiny bits and hence difficult to see from aerial views
5.)Which of the following information can you find in a safety data sheet (previously called MSDS)? One or more answers may be correct.
a. The molecular weight
b. Vapor density
c. First aid procedure
d. Specific gravity
e. dose-response curve
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