Solubility of Metal Salts


Report Sheet: Solubility of Metal Salts



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Solubility of Metal Salts
Report Sheet: Solubility of Metal Salts
Name ________________________________ Date ____________________

Sulfides (S-2)

Cations

Observations

Formula

Al3+










Fe3+










Pb2+










Ba2+










Zn2+










Cu2+










Co2+










K+











Unknown metal









  1. Write molecular chemical equations for 2 sulfide compounds that precipitated.

1)

2)

Carbonates (CO3-2)



Cations

Observations

Formula

Al3+










Fe3+










Pb2+










Ba2+










Zn2+










Cu2+










Co2+










K+











Unknown metal









  1. Write molecular chemical equations for 2 carbonate compounds that precipitated.

1)

2)

Sulfates (SO4-2)



Cations

Observations

Formula

Al3+










Fe3+










Pb2+










Ba2+










Zn2+










Cu2+










Co2+










K+











Unknown metal









  1. Write molecular chemical equations for 2 sulfate compounds that precipitated.

1)

2)

Thiocyanates (SCN-)



Cations

Observations

Formula

Al3+










Fe3+










Pb2+










Ba2+










Zn2+










Cu2+










Co2+










K+











Unknown metal









  1. Write molecular chemical equations for 2 thiocyanate compounds that precipitated.

1)

2)



Hydroxides (OH-)

Cations

Observations

Formula

Al3+










Fe3+










Pb2+










Ba2+










Zn2+










Cu2+










Co2+










K+











Unknown metal









  1. Write molecular chemical equations for 2 hydroxide compounds that precipitated.

1)

2)



Identity of the unknown Metal ion: _________________________________.

Identity of the cation portion of each of the provided anions:_____________.

Solubility rules based on your observations in this lab:


Cation

Soluble Anion

Insoluble Anion

General rule (exceptions)

Al+3

 

 

 

Ba+2

 

 

 

Co+2

 

 

 

Cu+2

 

 

 

Fe+3

 

 

 

Pb+2

 

 

 

K+

 

 

 

Zn+2

 

 

 

These cations never form a precipitate: ________________________________


These cations always form a precipitate: ________________________________


Anion

Soluble Cations

Insoluble Cations

General rule (exceptions)

S-2










CO3-2










SO4-2










SCN-










OH-










These anions never form a precipitate: _____________________________________

These anions always form a precipitate: ____________________________________



Additional Questions:


  1. How would you tell another student how to decide whether a precipitate has formed when two solutions are mixed?

  2. Could potassium salts be substituted as the carriers of the anions?

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