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Ch. 17 - Acids & Bases

Ch. 17 - Acids & Bases. II. Strength of Acids & Bases (p.474-477) Strong vs. Weak pH. -. -. +. +. A. Strong vs. Weak. Strong Acid/Base 100% ions in water strong electrolyte HCl, HNO 3 , NaOH, LiOH. Weak Acid/Base few ions in water weak electrolyte HC 2 H 3 O 2 , NH 3. 14. 0. 7.

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Ch. 17 - Acids & Bases

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  1. Ch. 17 - Acids & Bases II. Strength of Acids & Bases(p.474-477) Strong vs. Weak pH

  2. - - + + A. Strong vs. Weak • Strong Acid/Base • 100% ions in water • strong electrolyte • HCl, HNO3, NaOH, LiOH • Weak Acid/Base • few ions in water • weak electrolyte • HC2H3O2, NH3

  3. 14 0 7 INCREASING BASICITY INCREASING ACIDITY NEUTRAL B. pH Scale • pH • a measure of the concentration of H3O+ ions in solution • measured with a pH meter or an indicator with a wide color range

  4. B. pH Scale pH of Common Substances

  5. ConcepTest • Which of the following "molecular" pictures best represents a concentrated solution of the weak acid HA? A B

  6. ConcepTest • Is the following statement TRUE or FALSE? • A strong acid has a lower pH than a weak acid. • FALSE - Strong/weak refers to amount of ionization whereas pH refers to concentration of H+.

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