Acids and Bases: CharacteristicsAt the conclusion of our time together, you should be able to: Give examples of acids and bases List some properties of acids and bases Compare and contrast the characteristics of acids and bases
Acids Have a sour taste. Ex. Vinegar is a solution of acetic acid. Citrus fruits contain citric acid. React with certain metals to produce hydrogen gas. React with carbonates and bicarbonates to produce carbon dioxide gas Bases Have a bitter taste. Feel slippery. Many soaps contain bases.
Some Properties of Acids • Produce H+ (as H3O+) ions in water (the hydronium ion is a hydrogen ion attached to a water molecule) • Taste sour, Corrode metals, Electrolytes • React with bases to form a salt and water • pH is less than 7, Turns blue litmus paper to red “Blue to Red A-CID”
Some Properties of Bases • Produce OH- ions in water • Taste bitter, chalky, are electrolytes • Feel soapy, slippery • React with acids to form salts and water • pH greater than 7 • Turns red litmus paper to blue “Basic Blue”
Acids and Bases: CharacteristicsLet’s see if you can: Give examples of acids and bases List some properties of acids and bases Compare and contrast the characteristics of acids and bases
Which of the following is not a characteristic of an acid? • Tastes sour • pH is lower than 7 • Reacts with a base to form salt and water • Turns litmus paper blue • Produces H+ ions in water • All answers are correct
Which of the following is not a characteristic of a base? • Tastes bitter • pH is higher than 7 • Reacts with an acid to form salt and water • Turns litmus paper blue • Produces OH- ions in water • All answers are correct