LAUNCH

• Guess whether the following household items are acidic or basic and predict what their actual pH is.

• 1. Clorox Bleach• 2. Lemon Juice• 3. Mouthwash• 4. Vinegar• 5. Ammonia• 6. Baking Soda

Answer

• Clorox Bleach, 12.6

STRONG BASE!

Answer

• Lemon Juice, 2.3

• STRONG ACID!!!

Answer

• Mouthwash, 4.1

• Weak acid

Answer

• Vinegar, 3

• Strong Acid

Answer

• Ammonia, 10

• Strong Base!!!

Answer

• Baking Soda, 8.4

• Weak Base

Enzymes, Day 3

Enzymes are proteins

Changing the pH or temperature of the enzyme is the best way to stop it

If we effect an enzyme so that it doesn’t work, what happens to the chemical reaction?

A. It speeds upB. It slows downC. It stopsD. Nothing happens to the reaction

What happens when it gets hot?Just like a plastic tape dispenser can’t work when it is melted, enzymes can’t work if they get too hot and are “melted”

We call this “denatured”