Soft water contains relatively large concentrations of A) iron ...

[ts19998]

Soft water contains relatively large concentrations of
 
  A) iron ions.
  B) magnesium ions.
  C) potassium ions.
  D) calcium ions.

Question 2

All of the following statements are true of hard water EXCEPT
 
  A) it contains calcium salts.
  B) it contains iron salts.
  C) it contains only Na+ and K+ ions.
  D) it forms an insoluble scum with soap.

Question 3

Chlorinated hydrocarbons have been used as insecticides.
 
  Indicate whether the statement is true or false

[vish98]

Answer to Question 1

C

Answer to Question 2

C

Answer to Question 3

TRUE

[ts19998]

YES! Correct, THANKS for helping me on my review

[chereeb]

Thanks for the timely response, appreciate it