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Chapter 4 Key Concepts in Ziegler's Chemistry Textbook (10th ed.) - Prof. Zelda Ziegler, Assignments of Chemistry

A set of key concepts from chapter 4 of ziegler's chemistry textbook (10th edition) for the fall 2005 semester. It includes terms to be defined, problems to be solved, and answers to selected problems. Topics covered include solutions, solvents, solutes, dissolving, aqueous solutions, strong and weak electrolytes, precipitation reactions, acid-base reactions, oxidation numbers, redox reactions, and molarity.

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Pre 2010

Uploaded on 08/16/2009

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CH 221 – Ziegler KEY CONCEPTS Chapter 4
Fall 05 10th ed.
Class period 1 – Read pp. 120-125.
1. Define the following terms
a. solution
b. solvent
c. solute
d. dissolving
e. aqueous solution
f. strong electrolyte
g. weak electrolyte
Problems 4.1, 4.15
Class period 2 Read pp 126-130
2. Apply the information in Table 4.1 to predict precipitation reactions and to write net
ionic equations for them. Problems 4.19, 4.21, 4.24, 4.90
Class period 3 – Read pp. 131-137b.
3. Classify a substance as an acid or base and as strong or weak. Problem 4.37.
4. Write net ionic equations for acid-base reactions. Problem 4.40
Class period 4 – Read pp. 137b-141, 142m-144m, 144-150.
5. Determine oxidation numbers of elements in compounds. Problem 4.50
6. In a redox equation, identify the oxidizing agent and the reducing agent. Problem 4.51
7. Relate the molarity of a solution to number of moles of solute, volume of solution, and/or
molarity of ions. Problem 4.62
Class period 5 – Read pp. 151-153
8. Determine the molarity of a solution prepared by diluting a solution of known
concentration to a known volume. Problems 4.69a, 4.65, 4.671
9. Use the net ionic equation for an acid-base reaction to determine the volume of solution
required for reaction, i.e., titrations. Problems 4.80, 4.82, 4.67a.
For the Monday Thursday section:
Class Period 1: KC 1, 2 Class Period 2: KC 3, 4, 5, 6
Class Period 3: KC 7, 8, 9 Class Period 4 KC 9.
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Download Chapter 4 Key Concepts in Ziegler's Chemistry Textbook (10th ed.) - Prof. Zelda Ziegler and more Assignments Chemistry in PDF only on Docsity!

CH 221 – Ziegler KEY CONCEPTS Chapter 4 Fall 05 10 th^ ed.

Class period 1 – Read pp. 120-125.

  1. Define the following terms a. solution b. solvent c. solute d. dissolving e. aqueous solution f. strong electrolyte g. weak electrolyte Problems 4.1, 4.

Class period 2 Read pp 126-

  1. Apply the information in Table 4.1 to predict precipitation reactions and to write net ionic equations for them. Problems 4.19, 4.21, 4.24, 4.

Class period 3 – Read pp. 131-137b.

  1. Classify a substance as an acid or base and as strong or weak. Problem 4.37.
  2. Write net ionic equations for acid-base reactions. Problem 4.

Class period 4 – Read pp. 137b-141, 142m-144m, 144-150.

  1. Determine oxidation numbers of elements in compounds. Problem 4.
  2. In a redox equation, identify the oxidizing agent and the reducing agent. Problem 4.
  3. Relate the molarity of a solution to number of moles of solute, volume of solution, and/or molarity of ions. Problem 4.

Class period 5 – Read pp. 151-

  1. Determine the molarity of a solution prepared by diluting a solution of known concentration to a known volume. Problems 4.69a, 4.65, 4.
  2. Use the net ionic equation for an acid-base reaction to determine the volume of solution required for reaction, i.e., titrations. Problems 4.80, 4.82, 4.67a.

For the Monday Thursday section: Class Period 1: KC 1, 2 Class Period 2: KC 3, 4, 5, 6 Class Period 3: KC 7, 8, 9 Class Period 4 KC 9.

CH 221 – Ziegler KEY CONCEPTS Chapter 4 Fall 05 10 th^ ed.

Answers to Assigned problems

4.24 a) 2Cr+3(aq) + 3CO 3 -2^ (aq) Æ Cr 2 (CO 3 ) 3 (s) Spectators: NH 4 +, and SO 4 -

b) Ba+2(aq) + SO 4 -2^ (aq) Æ BaSO 4 (s) Spectators: NO 3 -^ and K+ c) Fe+2^ (aq) + 2 OH-^ (aq) Æ Fe(OH) 2 (s) Spectators: K+^ and NO 3 -

4.40 a) overall equation: HC 2 H 3 O 2 (aq) + KOH (aq) Æ H 2 O(l) + KC 2 H 3 O 2 (aq)

Net Ionic equation: HC 2 H 3 O 2 (aq) + OH-^ (aq) Æ H 2 O(l) (acetic acid is a weak acid) b) overall equation: Cr(OH) 3 (s) + 3HNO 3 (aq) Æ Cr(NO 3 ) 3 (aq) +3H 2 O (l) net Ionic equation: Cr(OH) 3 (s) + 3H+(aq) Æ Cr+3^ (aq) + 3H 2 O (l) (the solid dissolves) c) overall Equation; 2HClO (aq) + Ca(OH) 2 (aq) Æ Ca(ClO) 2 (aq) + 3H 2 O(l) net Ionic Equation: HClO (aq) + OH-^ Æ H 2 O (l) + ClO-^ (aq)

4.50 a) Ti =+4, b) Sn = +4 c) C = +3 d) N = -2 e) N= +3 f) Cr = +

4.62 a) 0.193 M Na 2 SO 4

b) 0.0106 moles KMnO 4 c) 22.0 mL of the concentrated solution.

4.80 a) 84.2 mL of a 0.120 M HCl solution

b) 20.0 mL H 2 SO 4 c) 0.0949 M BaCl 2 d) 0.329 grams of Ca(OH) 2

4.82 80.4 grams HC 2 H 3 O 2 in one quart of this vinegar.