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
1 6 10 Enzymes, Day 3
May 20, 2015
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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”
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