4 CFESA Steam Chapter 4 - Water
Quality
1.) Describe the water hydrological cycle. - answer Water evaporates from lakes, rivers,
oceans, ground, etc. The water vapor enters the air and rises eventually forming clouds.
When the clouds become saturated, it begins to rain returning the water to the earth.
2.) How does the pollution from automobiles, plant life, and combustion affect our water
supply? - answer the exhaust vapors in the atmosphere combine with the rain forming
more dangerous pollution chemicals in liquid form that fall back to the ground, rivers,
ect.
3.) Why does the carbon dioxide gas in the air create such a water problem? - answer
Mixes with rain and forms carbonic acid.
4.) How does our water system become hard water if rain water is so pure when it
leaves the clouds? - answer The rain mixed with the pollutants create acids that
dissolve the limestone and other hard minerals washing them down into our water
tables, lakes ect.
5.) What is the PH index and why is it important? - answerA scale used to measure
acidity and alkalinity.
6.) What PH is a neutral solution? - answer7
7.) A PH of 2 is how much more acidic than a PH of 3? - answer10 times
8.) Give a couple of examples of common materials with acidic PH factors. -
answerVinegars, lemon juice, battery acid
9.) What material has a neutral PH of 7? - answerWater
10.) What is the difference between suspended and dissolved solids in water? -
answerDissolved solids are dissolved in the water and part of its chemical makeup.
Suspend solids are in the water and separate from the chemical makeup of the water.
11.) How does the concentration of solids in water relate to the amount of scale build up
that will occur? - answerThe more solids the more scale left after the water vaporizes.
12.) Hard water is considered to have a hardness of how many grains per gallon? -
answer7-10
Quality
1.) Describe the water hydrological cycle. - answer Water evaporates from lakes, rivers,
oceans, ground, etc. The water vapor enters the air and rises eventually forming clouds.
When the clouds become saturated, it begins to rain returning the water to the earth.
2.) How does the pollution from automobiles, plant life, and combustion affect our water
supply? - answer the exhaust vapors in the atmosphere combine with the rain forming
more dangerous pollution chemicals in liquid form that fall back to the ground, rivers,
ect.
3.) Why does the carbon dioxide gas in the air create such a water problem? - answer
Mixes with rain and forms carbonic acid.
4.) How does our water system become hard water if rain water is so pure when it
leaves the clouds? - answer The rain mixed with the pollutants create acids that
dissolve the limestone and other hard minerals washing them down into our water
tables, lakes ect.
5.) What is the PH index and why is it important? - answerA scale used to measure
acidity and alkalinity.
6.) What PH is a neutral solution? - answer7
7.) A PH of 2 is how much more acidic than a PH of 3? - answer10 times
8.) Give a couple of examples of common materials with acidic PH factors. -
answerVinegars, lemon juice, battery acid
9.) What material has a neutral PH of 7? - answerWater
10.) What is the difference between suspended and dissolved solids in water? -
answerDissolved solids are dissolved in the water and part of its chemical makeup.
Suspend solids are in the water and separate from the chemical makeup of the water.
11.) How does the concentration of solids in water relate to the amount of scale build up
that will occur? - answerThe more solids the more scale left after the water vaporizes.
12.) Hard water is considered to have a hardness of how many grains per gallon? -
answer7-10
