1. DAILY QUESTION
December 1, 2008
What is soap?
(use the book definition)

2. Agenda 12/1/08 Daily Question Turn in Cross Disciplinary Wkshts
Ch 8 Section 3 Notes
Detergents Activity
Assignments: Ch 8 Studyguide due 12/3

3. Soap A substance that is used as a cleaner and that dissolves in water
Allows oil and water to form an emulsion
Are salts of sodium or potassium and fatty acids, COO- from animal fats or vegetable oils
Is an ionic compound
COO- group and Na+ or COO- group and K+

4. Soap Scum
Hard water (Mg2+, Ca2+, Fe3+) combines with fatty acids in soap to make soap scum

5. Detergents A water-soluble cleaner that can emulsify dirt and oil
Are Sodium, Potassium, and Ammonium Salts and fatty acids,SO3- group, from petroleum products
Does not make soap scum

6. Disinfectant A substance that kills bacteria and viruses
Bleach, NaOCl, is a disinfectant
Does not remove the substance causing the stain, just makes it colorless
Bleaching action is done by the hypochlorite ion, ClO-
Never mix bleach with an acid
Never mix ammonia and bleach