Bellwork 1. See the images of the seating on a bus

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Presentation transcript:

Bellwork 1. See the images of the seating on a bus Bellwork 1. See the images of the seating on a bus. Using the vocabulary describing solutions, which is unsaturated, supersaturated, and which is saturated? Saturated Unsaturated Supersaturated

The Chemistry of Acids and Bases To play the movies and simulations included, view the presentation in Slide Show Mode.

Acid and Bases

Acid and Bases

2. What is an acid? a. An acid is a solution that has an excess of H+ ions. It comes from the Latin word acidus that means "sharp" or "sour". b. The more H+ ions, the more acidic the solution.

3. Properties of an Acid a. Tastes Sour b. Conduct Electricity c. Corrosive, which means they break down certain substances. Many acids can corrode fabric, skin and paper d. Some acids react strongly with metals – Tomatoes turn Aluminum foil black. e. Turns blue litmus paper red Picture from BBC Revision Bites http://www.bbc.co.uk/schools/ks3bitesize/science/chemistry/acids_bases_1.shtml

4. Uses of Acids a. Acetic Acid = Vinegar b. Citric Acid = lemons, limes, & oranges. It is in many sour candies such as lemonhead & sour patch. c. Ascorbic acid = Vitamin C which your body needs to function. d. Sulfuric acid is used in the production of fertilizers, steel, paints, and plastics. e. Car batteries

5. What is a base? a. A base is a solution that has an excess of OH- ions. b. Another word for base is alkali.

6. Properties of a Base a. Feel Slippery b. Taste Bitter c. Corrosive d. Can conduct electricity. (Think alkaline batteries.) e. Do not react with metals. f. Turns red litmus paper blue.

7. Uses of Bases a. Bases give soaps, ammonia, and many other cleaning products some of their useful properties. b. The OH- ions interact strongly with certain substances, such as dirt and grease. c. Chalk and oven cleaner are examples of familiar products that contain bases. d. Your blood is a slightly basic solution.

8. pH Scale a. pH means “potential hydrogen” b. pH is a measure of how acidic or basic a solution is. c. The pH scale ranges from 0 to 14. d. Acidic solutions have pH values below 7 e. A solution with a pH of 0 is very acidic. f. A solution with a pH of 7 is neutral. g. Pure water has a pH of 7. h. Basic solutions have pH values above 7.