Chemistry 338 2 Semester Final Exam Review Sheet

Unit 9 - Acids and Bases _Chapters 14-15 & 18
22. Calculate the pH of the following and classify acid/base/neutral:
a. 1.0x10 -2 M = [H + ] b 3.7 x 10 -5 M = [OH - ]
pH = 2 - Acid
pH = 9.57 – base
23. A 0.11 M weak acid has a [H + ] = 0.0004 M at equilibrium. What is the Ka of the acid?
1 HA (aq) ↔ 1 H + (aq) + 1 A - (aq)
I 0.11 0 0
C -0.0004 +0.0004 +0.0004
E 0.1096 0.0004 0.0004
Ka = [H+][A-] Ka = [0.0004][0.0004] Ka = 1.46x10 -6
[HA] [0.1096]
24. How many mL of a10 M HCl are needed to neutralize 380 mL of a 7 M NaOH?
1 HCl + 1 NaOH 1 NaCl + 1 H 2 O
380 mL _ NaOH 1 L _ NaOH 7 mol _ NaOH 1 mol _ HCl 1 L _ HCl 1000 mL _ HCl
x x x x x
1 1000 mL _ NaOH 1 L _ NaOH 1 mol _ NaOH 10 mol _ HCl 1 L _ HCl
= 266 mL HCl
25. In the following reaction, identify the acid and base and its conjugate pairs (Bronsted-
Lowry): H 2 O + NH 3 → NH 4 + + OH -
A B CA CB
26. Name the following acids:
a) H 2 S – hydrosulfuric acid
b) HNO 2 – nitrous acid
c) HClO 3 – chloric acid
27. What is the salt that forms when Sr(OH) 2 reacts with HNO 3 ?
Sr(OH) 2 + 2 HNO 3 Sr(NO 3 ) 2 + 2 H 2 O
Sr(NO 3 ) 2
Unit 10 - Electrons – Chapter 4, 6
28. Draw the lewis dot structure, state the shape, and hybridization
a. CH 4 - tetrahedral, sp 3