Name: Lab #___
Making Paint Lab
Exploring the Practical Uses of Double Replacement Reactions
Introduction
Most paints consist of colored pigments combined with a binder to keep them soft and allow them to spread on paper or canvas. In this activity we will chemically produce several colored pigments.
Purpose
The purpose of this lab is to make paint using double replacement reactions
Safety
Wear goggles and aprons. Materials are toxic- avoid contact and wash hands thoroughly.
Procedure
Choose one of the colors from the table below. Pour approximately 1/4 of reactant 1 in a small test tube.
Add about 1/4 of reactant 2.
Allow the precipitate to settle for a minute. If you can decant the liquid, (decant means to pour off the topmost layer of liquid).
On a watch glass or plastic weigh boat put a few drops of glue and a few drops of the precipitate (paint). You may have to use a stirring rod or wooden splint to get some of the precipitate out of the test tube.
Use a Q-tip to mix the glue and precipitate. Paint a small sample in the Data Table.
Paint a picture on the bottom of this page. Draw one of the Angry Birds next to your name.
Data Table
Color |
Reactant 1 |
Reactant 2 |
Paint Sample |
White |
CaCl2 (aq) |
Na2CO3 (aq) |
|
Yellow |
FeCl3 (aq) |
Na2SiO3 (aq) |
|
Blue |
CoCl2 (aq) |
Na2SiO3 (aq) |
|
Lavender |
CoCl2 (aq) |
Na2CO3 (aq) |
|
Conclusions:
1. Write and balance the reactions for the following colors:
White
Lavender
My Painting
2. Write the net ionic equation for the following colors:
White
Lavender
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