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Acid Properties

Press the Right Arrow Button to Advance through the Presentation!. SPI 0807.9.12 Acids and Bases. . Notes. Acid Properties An acid is any compound that increases the number of hydronium ions when dissolved in water.

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Acid Properties

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  1. Press the Right Arrow Button to Advance through the Presentation! SPI 0807.9.12 Acids and Bases  Notes • 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

  2. SPI 0807.9.12 Acids and Bases  Notes • 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 Acids

  3. SPI 0807.9.12 Acids and Bases Review Questions 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 hydronium sour Acids red

  4. SPI 0807.9.12 Acids and Bases Notes • 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 Example: hydrochloric acid with zinc metal

  5. Review Questions  SPI 0807.9.12 Acids and Bases 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 _________. 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)  Notes • A substance that changes color in the presence of an acid or base is an indicator. • This flask contains water and an indicator called bromthymol blue. • When acid is added, the color • changes to yellow.

  7. The pH scale  SPI 0807.9.12 Acids and Bases Notes Acids are 0 to 6.9 • 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)

  8. More About the pH scale  SPI 0807.9.12 Acids and Bases Notes pH 1 is stronger than pH 5 • 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

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

  10. Review Questions  SPI 0807.9.12 Acids and Bases 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? __________. pH scale 0 to 6.9 seven True vinegar

  11. SPI 0807.9.12 Acids and Bases Notes 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.

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

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