LecturePLUS Timberlake1 Acids and Bases. LecturePLUS Timberlake2 Acids and Bases Acids produce Hydrogen (H +) in solutions Bases produce Hydroxide (OH.

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Presentation transcript:

LecturePLUS Timberlake1 Acids and Bases

LecturePLUS Timberlake2 Acids and Bases Acids produce Hydrogen (H +) in solutions Bases produce Hydroxide (OH -) in solutions

LecturePLUS Timberlake3 Acids þ Produce more H + ions in water þ Taste sour þ Corrode (eat thru) metals  React with bases to form salts and water

LecturePLUS Timberlake4 Bases Produce more OH - ions in water Taste bitter, chalky Are electrolytes Feel soapy, slippery React with acids to form salts and water

LecturePLUS Timberlake5 Acid or base? H+ OH-

LecturePLUS Timberlake6 Acid or base? H+ OH-

LecturePLUS Timberlake7

8 Strong acids and bases Strong Acid Has a very LOW pH (0-3) Strong Base Has a very HIGH pH (11-14) More basic More acidic 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

LecturePLUS Timberlake9 Weak acids and bases Weak Acid= pH close to 7 ( ) Weak Base= pH close to 7 ( )

LecturePLUS Timberlake10 pH scale Measures the # H + and OH - in a solution Ranges from = Acid = # of H + ions > # of OH - ions 7 = Neutral = # of H + ions = # of OH - ions = Base = # of OH - ions > # of H + ions

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LecturePLUS Timberlake16 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 Timberlake17 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 Timberlake18 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 Timberlake19 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 B 4. Is an electrolyte _A_ 5. Produces H + in aqueous solutions

LecturePLUS Timberlake20 Learning Check AB5 Acid, Base Name or Salt CaCl 2 _______________________ KOH_______________________ Ba(OH) 2 ______ _________________ HBr_______________________ H 2 SO 4 ________________________

LecturePLUS Timberlake21 Solution AB5 Acid, Base Name or Salt CaCl 2 saltcalcium chloride KOHbasepotassiuim hydroxide Ba(OH) 2 basebarium hydroxide HBracidhydrobromic acid H 2 SO 4 acidsulfuric acid