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Author Question: Passing arsenic contaminated water through a long pipe filled with sand and iron powder leads to ... (Read 38 times)

ARLKQ

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on: Jul 29, 2018
Passing arsenic contaminated water through a long pipe filled with sand and iron powder leads to removal of the arsenic by
 
  A) a physical change.
  B) an oxidation-reduction reaction.
  C) ion exchange.
  D) filtering out the suspended arsenic particles.
  E) only a and b

Question 2

Treating water with chlorine or ozone during water purification is an example of
 
  A) a physical change.
  B) a chemical reaction.
  C) ion exchange.
  D) a solid dissolving in a liquid.
  E) only a and b


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mistyjohnson

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Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: B


ARLKQ

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Reply 2 on: Jul 29, 2018
Excellent

ktidd

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Reply 3 on: Yesterday
Gracias!

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