1. Acid Properties  An acid is any compound that increases the number of hydronium ions, H 3 O +, 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. 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 and/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 16. Then fill in the blanks using the following words… red, hydronium, compound, sour, litmus ( 1) An acid is any __________that increases the number of _____________ions. (2) Acids have a ______ flavor. (3) _________ paper is a common indicator used for acids and bases. (4) Blue litmus paper turns ______ in acids. compound SPI 0807.9.12 Acids and Bases Review Questions hydronium sour Litmus red

4. Acid Properties Continued Acids react with 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 ________. (6) Dissolved acids in water break apart and form _____. (7) Acids conduct _________. Review Questions SPI 0807.9.12 Acids and Bases metals ions electricity

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 from pale blue 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  Lemon juice is about 2.1

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 6 8 Notes SPI 0807.9.12 Acids and Bases pH 1 is stronger than pH 6

9. Fill in the blanks using the following words… 0 to 6.9, seven, 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 ______? Review Questions SPI 0807.9.12 Acids and Bases seven 0 to 6.9 pH scale

10. Fill in the blanks using the following words… vinegar, 2.1, True, (11) (True of 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? __________ (13) What is the pH level lemon juice? __________ Review Questions SPI 0807.9.12 Acids and Bases True vinegar 2.1

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 Notes SPI 0807.9.12 Acids and Bases

12. How are acids used? (continued)  Hydrochloric acid is 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. SPI 0807.9.12 Acids and Bases Notes

13. Fill in the blanks using the following words… paint, soft drinks, orange juice, paper (14) Citric acid and ascorbic acid (Vitamin C) are found in _____________. (15) Sulfuric acid is used to make _______ & _______. (16) Carbonic acid is found in ____________. Review Questions SPI 0807.9.12 Acids and Bases paper soft drinks orange juice paint

14. 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