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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

Ch. 17 - Acids & Bases

II. Strength of Acids & Bases(p.474-477)

Strong vs. Weak

pH

a strong vs weak

-

-

+

+

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
b ph scale

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
b ph scale4
B. pH Scale

pH of Common Substances

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

A

B

conceptest6
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+.