Colorless to White

DESCRIPTION:
This demonstration makes a white precipitate by mixing equal amounts of silver nitrate and potassium chloride:

AgNO3 (aq) + KCl (aq)  →  KNO3 (aq)  + AgCl (s)

TOPICS COVERED:
double replacement reactions
precipitate reactions
color change
chemical change
solubility

MATERIALS NEEDED:
– 0.2M AgNO3
– 0.2M KCl
– small beaker
– disposable pipets

PROCEDURE:
1. Add a few mL of silver nitrate to the beaker
2. Add a few mL of potassium chloride to the beaker

ADDITIONAL COMMENTS:
This is a great one for students to do.

SAFETY:
Safety goggles should be worn at all times.

Handout

This lesson plan‘s topic is the Evidences of Chemical Reactions. Students learn the various evidences, then they get a change to practice identifying them with a hands on activity. Colorless to White is used in the activity portion of this lesson.