|
 Printable Version
for your convenience!
Title - Changes with Acids & Bases
By - Chris
Subject - Science
Grade Level - K-5
Need: 1/2 red cabbage water
knife lemon juice
2 large bowls baking soda
colander 2 clear glasses
various household objects: orange juice, apple juice, veggie soup broth, egg white, coke, cream of tartar, vinegar, tea...
1. Cut cabbage into small pieces. Place in a bowl and cover with two cups of very hot water. Let stand for 15 - 20 minutes or until the water turns purple.
2 Separate the purple water from the cabbage by pouring the mixture through a colander into another bowl. This will be the indicator.
3 Pour a small amount of the indicator into a glass. Add a few drops of lemon juice. Note the color change. This will be the acid.
4 Pour a small amount of the indicator into a second glass and add a pinch of baking soda. Note the color change. This will be the base.
5 Rinse out the glasses and experiment with the other items. Mix the acid and bases together and see what happens.
NOTE: Some items will not change the color of the indicator - they are neutral.
I use this with preschoolers to work on the concepts of color and the concept of change. With some creativity, this is easily adapted.
E-Mail Chris!
|
Math
Language Arts
Science
Social Studies
Art
Computers & Internet
Music
P.E. & Health
Other
Multi-Disciplinary
