Question #e0ade

1 Answer
Aug 23, 2017

Answer:

Here are the procedures I devised.

Explanation:

They use the following (limited) solubility rules:

  1. Salts containing Group 1 cations are soluble.
  2. Salts containing nitrate ion (#"NO"_3^"-"#) are soluble.
  3. Salts containing chloride ion #"Cl"^"-"# are soluble, except for #"AgCl"#.
  4. Sulfides of transition metals are insoluble.
  5. Group 2 carbonates are insoluble.
  6. Phosphates such as #"Ca"_3("PO"_4)_2# are insoluble.

a. #"Cl"^"-"# and #"PO"_4^"3-"#

Scheme 1

  1. Add a solution of calcium nitrate.
  2. Remove the precipitate of calcium phosphate.
  3. Add a solution of silver nitrate.
  4. A precipitate of silver chloride forms.

b. #"Ca"^"2+"# and #"Ag"^"+"#

Scheme 2

  1. Add a solution of sodium chloride.
  2. Remove the precipitate of silver chloride.
  3. Add a solution of sodium carbonate.
  4. A precipitate of calcium carbonate forms.

c. #"Cu"^"2+"# and #"Ca"^"2+"#

Scheme 3

  1. Add a solution of sodium sulfide.
  2. Remove the precipitate of copper(II) sulfide.
  3. Add a solution of sodium carbonate.
  4. A precipitate of calcium carbonate forms.