Ch 2.2 Water to drink

Question 1

Concentration

Answer 1

The amount of a substance found in a certain volume of another substance

Question 2

Water quality

Answer 2

The measurement of substance in water besides water molecules

Question 3

pH

Answer 3

The measurement of how acidic or basic the water is

Question 4

Filtration

Answer 4

The process which water goes through a series of screens, and large particles cannot go through

Question 5

Hardness

Answer 5

The combined level of calcium and magnesium in water

Question 6

Sewage

Answer 6

Waste water, or water with different kinds of wastes

Question 7

Coagulation

Answer 7

The process in which particles stick to the flocs

Question 8

What are the steps for drinking water treatment?

Answer 8

1. Filtration: water goes through series of screens to remove trash
2. Chemicals are added to form sticky flocs
3. Floc sink to bottom
4. Filter water again through sand to remove algae, bacteria and chemical
5. Chlorine is added to kill organisms
6. Water is aerated for better taste and odor
7. Add sodium or lime to soften the water

Question 9

What are the steps for septic system?

Answer 9

1. sewage enters the system through the inlet pipe, bacteria breaks down the waste
2. Less-dense waste float to the top of the septic tank, needs to be pumped out
3. Denser waste sink to the bottom of the septic tank, needs to be pumped out
4. Water and waste go to the leach field through the outlet pipe

Question 10

Who sets the water quality standard in the US?

Answer 10

Environmental Protection Agency

Question 11

pH of 0 is…

Answer 11

Acid

Question 12

Pure water’s pH is…

Answer 12

7, neutral

Question 13

Hard water soap doesn’t make…

Answer 13

Suds

Question 14

E. coli is found in…

Answer 14

Animal and human feces

Question 15

Water is delivered to your house from…

Answer 15

1. Central pumping station —> water main (pipes)

2. Water tower on top of hill, released when needed