Transcript Tuesday, December 2

DAILY QUESTION
December 2, 2008
1. What is an antacid?
Agenda
12/2/08
• Daily Question
• Ch 8 Section 3 Notes
– Antacid activity
• Assignments:
1. 8-3 Wksht due 12/3
2. Studyguide due 12/3
Antacids
• Are basic substances that you swallow to
neutralize stomach acid
Shampoos
• Are made from detergents, so there is no
soap scum
• Are pH balanced, usually between 5 and 8
– If too basic, hair is dull and lifeless
– Higher pH = more effective at cleaning
– Lower pH = protect dry hair
Acids keep fruit fresh longer
• The citric acid in the lemon juice helps
antioxidants in the apple that react with
oxygen before the oxygen can react with
other substances in the apple
Acids in the Kitchen
• Tenderizing meat: Acidic marinades help
denature proteins in the meat
• Formation of yogurt: Lactic acid denatures
the protein in casein and turns milk into
yogurt
Bases in the Kitchen
• Unclog a drain: Pour lye down it
• Make cookies rise during baking: Baking
soda form carbon dioxide gas
• Make fluffy cakes: Baking powder that
releases carbon dioxide gas