CO2 Pancakes

Objective:  Create a gas through a chemical reaction and observe the effect of the gas on a pancake.CO2 Pancakes

Materials

1 egg
1/2 cup milk
1.5 tsp vinegar
1/2 cup all-purpose flour (not self-rising)
1/4 cup sugar
1/8 tsp baking soda
1/8 tsp salt
2 cups for mixing
Fork for mixing
Small frying pan
Non-stick cooking spray
Pancake spatula
Measuring spoons


ProcedureDownload the Word document.

  1. Memorize: tsp=teaspoon, tbs=tablespoon
  2. Beat egg till the yolk and white are thoroughly mixed.
  3. Make a pancake according to the first recipe.
  4. Make a pancake according to the second recipe.

CO2 Pancakes

3 tbs milk
1.5 tsp acetic acid*
1 tbs egg
1/4 cup flour
1.5 tsp sugar
1/8 tsp baking soda
1/8 tsp salt

  1. Mix milk with acetic acid in a cup and set aside for 5 minutes to denature.
  2. Mix dry ingredients in a separate cup till uniform.
  3. After milk has denatured for 5 minutes, mix egg into it.
  4. Add the dry mixture to the wet mixture and stir just until powder is gone. Do you see a chemical reaction happening?
  5. Heat pan to medium.
  6. Spray cooking spray on the pan only where you plan to pour batter, and wait till it looks hot.
  7. Pour your batter onto the cooking spray.
  8. When bubbles appear on the surface, flip and brown the other side.
  9. Turn off stove and enjoy your pancake.

Non-CO2 Pancakes

3 tbs milk
1.5 tsp acetic acid without the acid*
1 tbs egg
1/4 cup flour
1.5 tsp sugar
1/8 tsp baking soda without the sodium bicarbonate**
1/8 tsp salt

  1. Mix milk with water in a cup and set aside.
  2. Mix dry ingredients in a separate cup till uniform.
  3. Mix egg into watered milk.
  4. Add the dry mixture to the wet mixture and stir just until powder is gone. Do you see a chemical reaction happening?
  5. Heat pan to medium.
  6. Spray cooking spray on the pan only where you plan to pour batter, and wait till it looks hot.
  7. Pour your batter onto the cooking spray.
  8. When bubbles appear on the surface, flip and brown the other side.
  9. Turn off stove and try to enjoy your pancake.

*Hint: Read the ingredients on a bottle of vinegar.
**Hint: Read the ingredients on a box of baking soda.

Questions

  1. What was different about the non-CO2 pancake?
  2. What was different about the non-CO2 procedure?
  3. Which ingredient(s) created the CO2?
  4. Can you write the chemical equation for this reaction?
  5. What would happen if you let the CO2 batter sit open too long before cooking the pancake?