1. Acid Properties  An acid is any compound that increases the number of hydronium ions when dissolved in water.  Acids have a sour flavor The sour taste of lemons, limes, and other citrus fruits is a result of citric acid.  Acids neutralize bases and bases neutralize acids Notes SPI 0807.9.12 Acids and Bases Press the Right Arrow Button to Advance through the Presentation!

2. Acid Properties  Acids change colors in indicators like litmus paper or phenolphthalein or bromthymol blue or cabbage juice  Litmus paper- is a common acid/base indicator and blue litmus paper turns red in acids Notes SPI 0807.9.12 Acids and Bases Acids

3. Number your paper from 1 to 12. Then fill in the blanks using the following words… red, hydronium, acids, compound, sour, ( 1) An acid is any __________that increases the number of _____________ions. (2) Acids have a ______ flavor. (3) _________ neutralize bases. (4) Blue litmus paper turns ______ in acids. compound SPI 0807.9.12 Acids and Bases Review Questions hydronium sour Acids red

4. Acid Properties Continued Acids react with some metals Acids react with some metals to produce hydrogen gas. Acids conduct electric current When acids are dissolved in water, they break apart and form ions. These ions make it possible for the solution to conduct an electric current. Example: batteries Notes SPI 0807.9.12 Acids and Bases Example: hydrochloric acid with zinc metal

5. Fill in the blanks using the following words… ions, electricity, metals (5) Acids react with some ________. (6) Dissolved acids in water break apart and form _____. (7) Acids conduct _________. Review Questions SPI 0807.9.12 Acids and Bases metals ions electricity BONUS QUESTION h How is an ion different from an atom? Ions have either a positive or negative charge. Atoms have no charge. Otherwise they are identical.

6. Acid Properties (continued)  A substance that changes color in the presence of an acid or base is an indicator. Notes When acid is added, the color changes to yellow. This flask contains water and an indicator called bromthymol blue.

7. The pH scale  pH scale: a way to determine the level of acidity or basicity of a substance. (tells you how strong or weak acids and bases are)  Acids are 0 to 6.9  7 is neutral (pure water is 7) 7 Notes SPI 0807.9.12 Acids and Bases Acids are 0 to 6.9

8. More About the pH scale  Again…acids are 0 to 6.9  The lower the number…the stronger the acid  In other words, an acid with a pH of 1 is stronger than an acid with a pH of 5 8 Notes SPI 0807.9.12 Acids and Bases pH 1 is stronger than pH 5

9. More About the pH scale  The pH scale can be displayed different ways.  Yet the ranges for acids and bases stays the same (0 to 6.9 for acids, 7.1 to 14 for bases) 9 Notes pH Scale Vertical (top to bottom) Horizontal (left to right) Horizontal (right to left) pH Scale Vertical (bottom to top)

10. Fill in the blanks using the following words… 0 to 6.9, True, seven, vinegar, pH scale (8) A __________ tells you how strong or weak an acid or base is. (9) On a pH scale, the range for acids is _______. (10) A neutral substance like pure water would have a pH of _______? (11) (True or False): An acid with a pH of 2 is stronger than an acid with a pH of 4. ___________. (12) Which substance has greater acidity, pure water or vinegar? __________. Review Questions SPI 0807.9.12 Acids and Bases seven 0 to 6.9 pH scale True vinegar

11. How are acids used?  Sulfuric acid is (most common) used to make paper, paint, detergents, fertilizers and many other products.  Nitric acid is used to make fertilizers, rubber, and plastics.  Hydrochloric acid is used to separate metal from their ores. It is also used in swimming pools and in your stomach.  Citric acid and ascorbic acid (Vitamin C) are found in orange juice and grapefruit juice.  Carbonic acid and phosphoric acid are in soft drinks. Notes SPI 0807.9.12 Acids and Bases

12. Link 01:Universal IndicatorUniversal Indicator Link 02:Coke can in acidCoke can in acid Link 03:Cheeseburger in Hydrochloric AcidCheeseburger in Hydrochloric Acid Video Links SPI 0807.9.12 Acids and Bases