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Acids and Bases

Acids and Bases. Acids and Bases. Acids produce Hydrogen (H +) in solutions Bases produce Hydroxide (OH -) in solutions . Acids. Produce more H + ions in water Taste sour Corrode (eat thru) metals React with bases to form salts and water. Bases.

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Acids and Bases

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  1. Acids and Bases LecturePLUS Timberlake

  2. Acids and Bases • Acids produce Hydrogen (H+) in solutions • Bases produce Hydroxide (OH-) in solutions LecturePLUS Timberlake

  3. Acids • Produce more H+ ions in water • Taste sour • Corrode (eat thru) metals • React with bases to form salts and water LecturePLUS Timberlake

  4. Bases • Produce more OH- ions in water • Taste bitter, chalky • Are electrolytes • Feel soapy, slippery • React with acids to form salts and water LecturePLUS Timberlake

  5. Acid or base? H+ OH- OH- H+ H+ OH- H+ LecturePLUS Timberlake

  6. Acid or base? OH- H+ OH- H+ OH- OH- H+ H+ OH- LecturePLUS Timberlake

  7. LecturePLUS Timberlake

  8. Strong acids and bases Strong Acid • Has a very LOW pH (0-3) Strong Base • Has a very HIGH pH (11-14) NaOH, 0.1 M Household bleach Household ammonia Lime water Milk of magnesia Borax Baking soda Egg white, seawater Human blood, tears Milk Saliva Rain Black coffee Banana Tomatoes Wine Cola, vinegar Lemon juice Gastric juice More basic More acidic LecturePLUS Timberlake

  9. Weak acids and bases • Weak Acid= pH close to 7 (3.1 - 6.9) • Weak Base= pH close to 7 (7.1 - 10.9) LecturePLUS Timberlake

  10. pH scale • Measures the # H+ and OH- in a solution • Ranges from 0-14 • 0- 6.9= Acid = # of H+ ions > # of OH- ions • 7 = Neutral = # of H+ ions = # of OH- ions • 7.1- 14 = Base = # of OH-ions > # of H+ ions LecturePLUS Timberlake

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  16. Learning Check AB1 Describe the solution in each of the following as: 1) acid 2) base or 3)neutral. A. ___soda B. ___soap C. ___coffee D. ___ wine E. ___ water F. ___ grapefruit LecturePLUS Timberlake

  17. Solution AB1 Describe each solution as: 1) acid 2) base or 3) neutral. A. _1_ soda B. _2_ soap C. _1_ coffee D. _1_ wine E. _3_ water F. _1_ grapefruit LecturePLUS Timberlake

  18. Learning Check AB2 Identify each as characteristic of an A) acid or B) base ____ 1. Sour taste ____ 2. Produces OH- in aqueous solutions ____ 3. Chalky taste ____ 4. Is an electrolyte ____ 5. Produces H+ in aqueous solutions LecturePLUS Timberlake

  19. Solution AB2 Identify each as a characteristic of an A) acid or B) base _A_ 1. Sour taste _B_ 2. Produces OH- in aqueous solutions _B_ 3. Chalky taste B4. Is an electrolyte _A_ 5. Produces H+ in aqueous solutions LecturePLUS Timberlake

  20. Learning Check AB5 Acid, Base Name or Salt CaCl2 ______ _________________ KOH ______ _________________ Ba(OH)2 ______ _________________ HBr ______ _________________ H2SO4 ______ __________________ LecturePLUS Timberlake

  21. Solution AB5 Acid, Base Name or Salt CaCl2 salt calcium chloride KOH base potassiuim hydroxide Ba(OH)2 base barium hydroxide HBr acid hydrobromic acid H2SO4 acid sulfuric acid LecturePLUS Timberlake

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