{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

#22 - Chapter 15 Acids and Bases Acid/bases Strength Weak...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 15: Acids and Bases Acid/bases Strength, Weak Acids, Acid Ionization Constant (Sec. 15.4 15.5)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
C. The pH (and pOH) Scale A Measures of Acidity (Sec. 15.3) pH = -log [H + ] pH = -log [H 3 O + ] or The pH scale: The pOH scale: pOH = -log [OH - ] At 25 0 C: pH + pOH = pK w =14.00 The connection between the pH and pOH scales: [H + ] = [OH - ] [H + ] > [OH - ] [H + ] < [OH - ] neutral acidic basic [H + ] = 1 x 10 -7 [H + ] > 1 x 10 -7 [H + ] < 1 x 10 -7 pH = 7 pH < 7 pH > 7 pH [H + ] At 25 0 C the solution is: Review from the last lecture:
Background image of page 2
D. Strength of Acids and Bases (Sec. 15.4) Recommended problems: 15.31-15.36, 15.43-15.45, 15.47(a),15.48(a),15.49 Strong Acid Weak Acid
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
D. Strength of Acids and Bases (Sec. 15.4) What is the pH of a 2 x 10 -3 M HNO 3 solution? HNO 3 is a strong acid 100% dissociation. HNO 3 ( aq ) + H 2 O ( l ) H 3 O + ( aq ) + NO 3 - ( aq ) Start End 0.002 M 0.0 M 0.0 M 0.0 M 0.002 M 0.002 M pH = -log [H + ] = -log [H 3 O + ] = -log(0.002) = 2.7 Monoprotic/polyprotic acid
Background image of page 4
Memorize the six strong acids! D. Strength of Acids and Bases (Sec. 15.4)
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
E. Weak Acids and Acid Ionization Constant (Sec. 15.5) HA ( aq ) + H 2 O ( l ) H 3 O + ( aq ) + A - ( aq ) HA ( aq ) H + ( aq ) + A - ( aq ) K a = [H + ][A - ] [HA] The equilibrium constant of ionization of an acid is denoted K a : and is called the acid ionization constant
Background image of page 6
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Background image of page 8
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}