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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
