LecturePLUS Timberlake1 Acids and Bases

LecturePLUS Timberlake2 EXPERIMENT # 1 Purpose: How can cabbage juice indicate if a substance is an Acid and Base?

LecturePLUS Timberlake3 Apparatus Vinegar, Baking Soda, Cornstarch, Salt, Lemon Juice, Orange Juice, Cream of Tartar, Ammonia, Hot Plate, Pot, Water, Purple Cabbage, Test Tube Rack, Test Tubes, Beaker, Graduated Cylinder, Stirring Rod, Lye, medicine dropper.

LecturePLUS Timberlake4 Method: Fill each test tube with 15 ml of purple cabbage juice. Add 5 drops of each test solution to the test tube. Observe any color changes of the cabbage juice in your data table, record the color and relative PH of each solution.

LecturePLUS Timberlake5 Data Table: Test Solution Cabbage Juice Color Relative PH Vinegar Lye Baking Soda Lemon Juice Ammonia Cream of tartar Salt Orange Juice Cornstarch

LecturePLUS Timberlake6 Diagram

LecturePLUS Timberlake7 Conclusion: Purple cabbage Juice is an indicator that turns pink when it is mixed with an acid. It turns yellow/green/blue when it is mixed with a base. It stays the same color purple when it is mixed with a neutral substance.

LecturePLUS Timberlake8 Acids þ Taste sour þ Corrode metals þ React with bases to form salts and water

LecturePLUS Timberlake9 Bases Taste bitter, chalky Feel soapy, slippery React with acids to form salts and water

LecturePLUS Timberlake10 Describe the solution in each of the following as: 1) acid 2) base or 3)neutral. A. ___soda B. ___soap C. ___coffee D. ___ wine E. ___ water F. ___ grapefruit

LecturePLUS Timberlake11 Describe each solution as: 1) acid 2) base or 3) neutral. A. _1_ soda B. _2_ soap C. _1_ coffee D. _1_ wine E. _3_ water F. _1_ grapefruit

LecturePLUS Timberlake12 Some Common Acids HCl hydrochloric acid HNO 3 nitric acid H 3 PO 4 phosphor ic acid H 2 SO 4 sulfur ic acid CH 3 COOH acet ic acid

LecturePLUS Timberlake13 pH of Some Common Acids gastric juice1.0 lemon juice2.3 vinegar2.8 orange juice3.5 coffee5.0 milk6.6

LecturePLUS Timberlake14 pH of Some Common Bases blood 7.4 tears 7.4 seawater 8.4 milk of magnesia10.6 household ammonia11.0

LecturePLUS Timberlake15 The pH Scale

LecturePLUS Timberlake The pH Scale

LecturePLUS Timberlake17 The pH Scale NeutralWeak Base Strong Base Weak Acid Strong Acid

LecturePLUS Timberlake NeutralWeak Base Strong Base Weak Acid Strong Acid The pH Scale