Chem Comm Unit 1D Review

What makes soft water "hard"?

• Minerals

• Soap

• Air

Tags

NGSS.HS-ESS2-5

Which of the following is not a way to chlorinate water?

• Bubbling chlorine

• Dissolve Calcium hypochlorite

• Add Sodium bicarbonate

What can we make at home to assist the natural purification process?

• Make a water shed

• Collect rain jugs

• Stop going outside

Tags

NGSS.MS-ESS2-4

Which is not a major metro area with hard water?

• San Antonio

• Las Vegas

• Mobile

True or False: Chlorine disinfects and kills water borne diseases.

• True

• False

Which step in the treatment plants prevents large objects from entering the plant?

• Pre-Chlorination

• Settling

• Screening

What extra step helps with tooth decay?

• Aeration

• pH Adjustment

• Fluoridation

How is a water softener "recharged"?

• You need to buy a new one

• Brine solution

• Plug it into an outlet

What is formed to trap particles during the flocculation process?

• Calcium chloride

• Aluminum hydroxide

• Sulfuric acid

What two substances are mixed during the flocculation process?

• Slaked lime and Alum

• Lime and Phosphoric acid

• Aluminum and Sand