NAME LAB MAKING PAINT LAB EXPLORING THE PRACTICAL

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Making Paint Lab


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

  1. Choose one of the colors from the table below. Pour approximately 1/4 of reactant 1 in a small test tube.

  2. Add about 1/4 of reactant 2.

  3. Allow the precipitate to settle for a minute. If you can decant the liquid, (decant means to pour off the topmost layer of liquid).

  4. 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.

  5. Use a Q-tip to mix the glue and precipitate. Paint a small sample in the Data Table.

  6. 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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