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Household Cabbage AcidBase Lab

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Chemistry 1

Household Cabbage AcidBase Lab

Click here to download: The Household Cabbage Acid Base Lab

Introduction

 

Cabbage juice is an acid/base indicator; it will turn different colors depending on the acidity or basicity of the solution.  For the lab you will set up three standard solutions (acid, base and neutral) to use for comparison with 17 other solutions (20 total).  All together you should be able to make a rainbow of color going from acid neutral base.  This lab can be done alone or in a group of your choosing.


Procedures

 

  1. Buy a red/purple cabbage.  Mix equal amounts of cabbage and water in a container.
  2. Either microwave or heat on the stove until boiling occurs.  At this point the cabbage should look whiter and the water will be purple.

*Tip: Putting it in a microwave will create a less “smelly” substance.*

  1. The purple cabbage will be used as the acid/base indicator.  Discard or eat the cabbage.
  2. Make a solution of vinegar (acetic acid) and cabbage juice.  Just add enough cabbage juice to see the new color.  This is your acid color.
  3. Make a solution of about one teaspoon baking soda (sodium carbonate) in one cup of water.  Add cabbage juice.  This is your neutral color.
  4. Make a solution of ammonia and cabbage juice.  This is your base color.

*You can buy straight ammonia cleaner or sometimes ammonia is in floor or window cleaner.*

  1. Now find 17 other substances to test.  In the kitchen, you can test food ingredients. (Drinks, juices and cleaners).  **Do not use bleach.  It makes a toxic gas with ammonia and it bleaches out any cabbage color.** In the bathroom you can test medicines, cosmetics, shampoos, etc.  White or light colored substances work best.  Solid/thick liquids can be dissolved in water and the mixed with the cabbage juice.  Add enough juice to see the color.
  2. Arrange the colors into a rainbow starting with acid neutral base.
  3. Make a list/table in order from most acidic to most basic.

List of Products

 

White Vinegar

Baking Soda

Windex

Hand Soap

Body Wash

Hair Shampoo

Cooking Oil

Fish Sauce

Mustard

Milk

Ketchup

Relish

Coke

Italian Dressing

Soy Sauce

Orange Juice

Apple Juice

Tabasco Sauce

Hydrogen Peroxide

Cookies N’ Cream Ice Cream


 

Name of Substance

What the substance contains

Color

Acid/Neutral/Base

White Vinegar

Vinegar

Pink

Acid

Italian Dressing

Lemon, Garlic

Pink

Acid

Apple Juice

Apple

Pink

Acid

Orange Juice

Orange

Red Orange

Acid

Tabasco

Distilled Vinegar

Red

Acid

Aaron Hydrogen Peroxide

Hydrogen Peroxide

Purple

Acid

Coke

Corn Syrup

Purple

Acid

Hand Soap

Triclosan

Purple

Acid

Viet Huong Fish Sauce

Fish Sauce

Purple & Black

Acid

Body Wash

Sodium Lauryl Sulfate

Blue Purple

Acid

Heinz Ketchup

Tomatoes

Orange

Acid

Heinz Mustard

Mustard

Orange

Acid

Heinz Relish

Pickles

Dark Orange

Acid

(Chinese) Soy Sauce

Soy Sauce

Brown

Acid

Arm & Hammer Baking Soda

Baking soda

Blue Green

Neutral

Cookies N’ Cream Ice Cream

Ice Cream

Blue

Neutral

Canola Cooking Oil

Vegetable Oil

Blue

Neutral

Hair Shampoo

Sodium Lauryl Sulfate, Panthenol

Lavender

Neutral

Springfield Milk

Slim Milk, Vitamin A

Lavender

Neutral

Windex

Ammonia D

Dark Green

Base

 


 

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