Essay on Solubility and Nr

Submitted By mnmartin
Words: 657
Pages: 3

Malarie Martin
CHEM 115
General Chemistry
Group 4
Experiment 8: Ionic Reactions

Purpose: In this lab we will study the nature of ionic solutions while observing their reactions. We will then write balanced equations to include the net ionic equations for the precipitation reactions observed.

Procedure:

1. Place a piece of black and white paper behind each well plate in order to observe the reactions with each combination. Record any reactions observed.
2. In the 96 well plate place 2 drops of cobalt nitrate into 7 of the wells marked A.
3. Place 2 drops of copper nitrate into 7 of the wells in the row marked B.
4. Place 2 drops of iron nitrate into 7 of the wells in the row marked C.
5. Place 2 drops of barium nitrate into 7 of the wells in the row marked D.
6. Place 2 drops of nickel nitrate into 7 of the wells in the row marked E.
7. Then place 2 drops of sodium phosphate into 5 of the vertical wells in the column marked 1.
8. Then place 2 drops of sodium iodide into 5 of the vertical wells in the column marked 2.
9. Then place 2 drops of sodium sulfate into 5 of the vertical wells in the column marked 3.
10. Then place 2 drops of sodium chloride into 5 of the vertical wells in the column marked 4.
11. Then place 2 drops of sodium bicarbonate into 5 of the vertical wells in the column marked 5.
12. Then place 2 drops of sodium carbonate into 5 of the wells in the column marked 6.
13. Then place 2 drops of sodium hydroxide into 5 of the wells in the column marked 7.
14. Record color change, precipitate, and/or bubble that are observed into table format.
15. Do not place the pipet directly into any of the solutions when adding the chemicals to the well plate.
16. Avoid contact with skin and clothes and clean up supplies and area thoroughly.

Results:

1 (Sodium Phosphate)
2 (Sodium Iodide)
3 (Sodium Sulfate)
4 (Sodium Chloride)
5 (Sodium Bicarbonate)
6 (Sodium Carbonate)
7( Sodium Hydroxide)
A (Cobalt Nitrate)
Rxn purple
NR
NR
NR
Rxn
Darker
Rxn
Rxn turquoise
B (Copper Nitrate)
Light blue
Rxn
Dark Yellow
NR
NR
Rxn
Rxn
Rxn
C (Iron Nitrate)
Rxn
Cloudy
Yellow
NR
NR
Dark Yellow
Dark Yellow
Light Yellow
D (Barium Nitrate)
Rxn
Cloudy
NR
White
NR
Rxn
Rxn
Dark Yellow
E (Nickle Nitrate)
Rxn
NR
NR
NR
Rxn
Rxn
Rxn
NR: No precipitate forms
Rxn: Precipitate is formed

Cations used: Ni2+, Ba2+, Cu2+, NO3-, Co2+, Fe3+,

Anions used: NO3-, PO43-, I-, SO42-, Cl-, 2CO32-, CO32-, OH-

Discussion:

A - Compare your results with the…