ch. 17 - acids & bases ii. strength of acids & bases (p.474-477) strong vs. weak ph
TRANSCRIPT
Ch. 17 - Acids & BasesCh. 17 - Acids & Bases
II. Strength of Acids & Bases (p.474-477)
Strong vs. Weak pH
A. Strong vs. WeakA. Strong vs. Weak
Strong Acid/BaseStrong Acid/Base• 100% ions in water• strong electrolyte• HCl, HNO3, NaOH, LiOH
Weak Acid/BaseWeak Acid/Base• few ions in water• weak electrolyte• HC2H3O2, NH3
- +
- +
B. pH ScaleB. pH Scale
0
7INCREASING
ACIDITY NEUTRALINCREASING
BASICITY
14
pHpH• 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 ScaleB. pH Scale
pH of Common SubstancespH of Common SubstancespH of Common SubstancespH of Common Substances
Which of the following "molecular" pictures best represents a concentrated solution of the weak acid HA?
ConcepTestConcepTest
A B
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+.
ConcepTestConcepTest