What is the purpose of allowing water to cascade or bubble in a ...

[jerry coleman]

What is the purpose of allowing water to cascade or bubble in a fountain during the purification process?
 
  A) to mix air into the water and improve flavor
  B) to remove radioactive gases
  C) to remove unpleasant smelling chemicals like sulfur
  D) all of the above
  E) only A and B

Question 2

What is the purpose of adding aluminum salts and a base to water during water treatment?
 
  A) The two together gel and trap dirt and bacteria.
  B) The higher pH kills bacteria.
  C) The aluminum removes the rust taste from the water.
  D) The base dissolves the dirt.
  E) It improves the taste.

[mathjasmine]

Answer to Question 1

Answer: D

Answer to Question 2

Answer: A

[jerry coleman]

Thank you!

[mathjasmine]

Always glad to help...