ACIDS a compound that increases the number of hydrogen ions (H+) when dissolved in water tastes sour An acid can change the color of certain compounds
What is an ion? An ion is an atom that has lost or gained an electron giving it a positive (+) or negative (-) charge.
USES OF ACIDS Citric & ascorbic acid (Vitamin C) = orange juice Carbonic & phosphoric acid give a “bite” to soft drinks Acids in your stomach aid in digestion Sulfuric acid is the most widely used industrial acid in the world. It’s used in making metals, paper, paints, and fertilizers.
BASES any compound that increases the number of hydroxide ions (OH-) when mixed with water tastes bitter feel slippery A base can change the color of certain compounds
Uses of Bases used in soaps (remember, bases are slippery) used to make paper, in oven cleaners, and to unclog drains Ammonia is a base and is used in many household cleaners
Detecting Acids and Bases You can detect an acid or a base using an indicator. INDICATOR - A substance that changes color in the presence of an acid or a base.
INDICATORS Litmus paper is an indicator An acid turns blue litmus paper red A base turns red litmus paper blue Cabbage juice can be used as an indicator. pH paper- turns a color & then match it to the pH scale given. pH meter- will give you a number for the solution.