water chemistry

Define the following terms:
a. Chemistry
b. Chemical Substance
c. Matter
d. Atom
e. Element
f. Compound
What are chemical compounds? State 20 chemicals used in water treatment along with their chemical formula.

What is a molecule and its properties ? Explain.

State and explain three theories that explain acid-behavior ?

What is alkalinity of water? When alkalinity measurements are used?

Explain what water hardness is and how a water softener works

How does water hardness occur? state and explain various types of water hardness?

What is water softening? Explain two principle methods of water softening?

What are commonly found water quality problems? Explain

Define the following terms:

a. Disinfection byproducts,

b. Haloacetic acids,

c. Iron bacteria,

d. Volatile organic compounds.