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Lab #4 - 10-2 - Elisa Giordano Due Lab#4 Studying the pH of...

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Elisa Giordano Due: October 11, 2006 Lab #4 Studying the pH of Strong Acid, Weak Acid, Salt, and Buffer Solutions INTRODUCTION The main purpose of this lab was to study the differences in pH between acids, bases, salts, and buffers. The use of Litmus paper, both red and blue, helped determine whether a substance was an acid or a base. Alkacid paper and hydrion paper was also used. The different paper types changed color depending on the acidity or alkalinity of a substance. EXPERIMENTAL PROCEDURES “See Lab Hand Out” DATA TABLE Part I. Determining the pH of Common Substances Cell Code Color Blue Litmus Color Red Litmus Acidic/Basic Color Alkacid Relative Activity Color pH Hydrion pH Pepsi A1 Red Acidic Orange 4 Yellow/Green 4 Vinegar A2 Red Acidic Red 4 Orange/Yellow 3 Glass Cleaner A3 Blue Basic Green 7-8 Dk. Green 8 Distilled Water A4 Tan/Green 7 Lt. Green 5 Dish Soap A5 Lt. Green 7-8 Bright Green 6 Ammonia A6 Blue Basic Dk. Blue 10 Royal Blue 10 Instant Coffee B1 Red Acidic Tan/Green 7 Green 7
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