10/2/14
3B
Micah Murphy
Color of Chemistry Lab
Introduction:
Solubility refers to the ability for a given substance to dissolve in a solvent. The substance being dissolved is the solute, and the liquid it dissolves in is the solvent. Intermolecular forces, temperature, and pressure are some factors that affect solubility. The bonds of the solute must be broken in order for them to dissolve. A very polar solvent like water is needed to cause dissolution for an ionic solute. It is possible to predict the outcome of a reaction and determine whether it is soluble or if a precipitate forms through the use of solubility rules. (Falcon Software, Inc., 2000)
Purpose:
To observe what happens when two aqueous solutions of ionic substances react and linking the observations of the reactions with the solubility rules.
Hypothesis:
My prediction is that the reactions of the two aqueous solutions of ionic substances will follow the solubility rules positively.
Materials:
Laminated Drop Sheet
Data Table
Pencil
Container of Ionic Substances
Toothpicks
Safety Note:
Since many of these solutions are moderately toxic by ingestion, wash your hands thoroughly after the lab is finished. Never eat or drink in the lab. Silver nitrate can stain skin and clothing if the solution touches them. Also, wear goggles and an apron while doing this lab.
Procedure:
At your lab station, you have a laminated drop sheet that corresponds to your data table. You will perform the experiment on this laminated sheet.
Make sure the laminated sheet is clean and dry before beginning.
For the first reaction, you will mix silver nitrate (AgNO3) with sodium phosphate (Na3PO4).
Before mixing these substances, record the original color of each solution in the place provided.
Place one drop of AgNO3 on every X on the first row.
Place one drop of Na3PO4 on every X on the first column.
Record the following information in your data table:
If you do not observe a change, record NR for no reaction.
If a change is observed, report the results of each of the reactions
The mixture can be clear
The mixture can be opaque
The mixture can change color
Use a toothpick to make sure the mixture is mixed well to help with the observations.
Repeat this process for the other solutions on your data table and record all of your results.
After recording your results, clean up by carefully carrying the laminated paper to the sink. Rinse well and dry thoroughly.
Results:
Solution Color Before Mixing Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Yellow-Green
Clear
Clear

Na3PO4
NaI
Na2SO4
Na2CO3
Na2SiO3
NaOH
NaHCO3
NaCl
NaBr
K3Fe(CN)6
Na2C2O4
Na2SO3
Clear
AgNO3
Opaque
Opaque
NR
Opaque
Opaque
Opaque
Opaque
Opaque
Opaque
Opaque
Opaque
NR
Pink
Co(NO3)2
Opaque
NR
NR
Opaque
Opaque
Opaque
Opaque
NR
NR
Opaque
Opaque
NR
Yellow
Fe(NO3)3
Opaque
Orange
NR
Opaque
Opaque
Opaque
Opaque
NR
NR
Opaque
Green
NR