Baking powder is a chemical leavening agent.
Read the label on a baking powder product to learn what ingredients are present.
Place a tablespoon of baking powder in your left hand.
Now pour a tablespoon of water over the powder.
What did you see, hear, and feel?
Repeat this activity with baking soda and vinegar and compare the results.
The longest loaf of bread on record in the United States was baked in 1987 and was 718.
4 meters (2,357' 10") long.
Using a grocery store loaf as a model, estimate how many slices you could cut from this large loaf.
How many sandwiches could you make?
Compare how you arrived at your estimate with the methods used by other people in your group.
With a calculator, find the actual number of sandwiches.
How close was your estimate?
Chemical leavening depends on the neutralization between an acid and a base to make carbon dioxide gas, water, and a salt.
ACID + BASE -----> CO2 + a SALT + H2O Add a scoop of baking soda to a plastic cup and begin adding vinegar drop by drop until the solid has disappeared and bubble formation has stopped.
Decide when the neutralization (end point when the acid and base are equal) is complete.
How many drops did it take to neutralize the acid?
Try other acids (lemon juice, soda, buttermilk) and compare.
What does the number of drops say about acid concentration?
Repeat the activity using milk instead of vinegar.
What do the results say about the nature of milk?
Pretend you are a yeast cell looking for a job making bread.
Write a resume describing yourself, your background, and why you feel qualified for the job.