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

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Presentation transcript:

Ch Acids & Bases II. Strength of Acids & Bases (p )  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

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

B. pH Scale pH of Common Substances

 Which of the following "molecular" pictures best represents a concentrated solution of the weak acid HA? ConcepTest AB

 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 +. ConcepTest