NEW

Question 1

Importance of Chelating Agents in water

Answer 1

1. Influences metal bioavailability
2. EDTA chelates with radioactive 60Co- for disposal
   Complexing agents have the ability to solubilise heavy metals

Question 2

Humic acid

Answer 2

Material that precipitates from acidified extract

E.g. Fulvic acid

Question 3

Example of trihalomethanes

Answer 3

Chloroform

Diobromomethane

Question 4

How are trihalomethanes formed

Answer 4

In the presence of humid substances-> disinfection of raw municipal drinking water by chlorination

Question 5

How to avoid formation of trihalomethanes

Answer 5

Organic impurities removed from water before a chlorination

Question 6

What is a cheating agent?

Answer 6

A common potential water pollutant

Substance whose molecules can form several bonds to a single metal ion

Question 7

Concerns/negatives of chelating agents?

Answer 7

Slowly biodegradable- persistent in the environment

Question 8

What caused the Minimata disease (M.d)

Answer 8

MgHe (Methyl Mercury)
mother’s ingested marine life leading to birth defects in their babies- lesions of the brain
Source- waste water from chemical plant