The lime-soda process is used for large-scale water-softening ...

[melina_rosy]

The lime-soda process is used for large-scale water-softening operations. CaO is added to ________.
 
  A) oxidize Fe2+ to insoluble Fe2O3
  B) cause precipitation of magnesium as Mg(OH)2
  C) remove most Al3+ as solid Al(OH)3
  D) cause precipitation of iron and magnesium as Fe2MgO4
  E) reduce the pH to 3-4

Question 2

A 0.100 M solution of ________ will contain the highest concentration of potassium ions.
 
  A) potassium phosphate
  B) potassium hydrogen carbonate
  C) potassium hypochlorite
  D) potassium iodide
  E) potassium oxide

[lkanara2]

Answer to Question 1

B

Answer to Question 2

A