CHM 1025C                                    Name: _________________
Module Eight Homework Packet

Module Eight: Solutions/Oxidation & Reduction (Chapter 13, 14 & 17)

A. _____(05) Solution Properties-From Lecture Answers

B. _____(05) Factors Affecting Rate of Dissolving-Sec 13.1, 13.2, 13.5, 13.6  & From Lecture Answers

C. _____(05) Writing Ionization Reactions acids/salts Sect 14.10, 14.11+ lecture Answers

D. _____(05) Solution Preparation Problems-Section 13.8, 13.9 Answers

E. _____(05) Solution Dilution Problems-Section Sect 13.10 Answers

F. _____(10) Solution Reaction Problems-Section 13.11 Answers

G. _____(10) Rewrite Equations Ionically –Section 14.11 Answers

H. _____(10) Redox Equations-Sections-Section 17.2—17.4 Answers

L.  _____(05) pH calculations-Section 14.8, 14.9 Answers

K. _____ (05) Key Terms Chap 13 p396, Chap 14 p433,

______(65) Total = ______% Chapter 13,14,17

M-8 Required Homework:

      ______(50) M-8 Pretest Hardcopy Homework Packet (buff) (Submit on Exam#4Day)

      ______(50) M-8 Multiple Choice (MC) Practice (Blackboard Online)

K1. _____  (15) Key Terms Chap 13 p396, Chap 14 p433, (Blackboard Online)

G2. ______(20) Hard Copy (Acid Media) Writing Net Ionic Reactions Homework (Sect 14.11)

H1. ______(30) Hardcopy REDOX Homework Pre/Post Lab Required)

H2. ______(48) REDOX Lab (12 Rounds)

M-8 Extra Credit:

G3. ______(00) Hard Copy (Basic Media) Writing Net Ionic Reactions Homework (Sect 14.11)

H3. ______(00) Hardcopy Redox Homework Post Lab Optional) (12 equations 5A-5B-2N)

H4. ______(00) Hardcopy Redox Homework Post Lab Optional) (Bonus Challenge)

                           Acid Media         Basic Media           Bonus Challenge

 

Part A: Solution Properties        05 points

List five of the six properties of a true solution:

 

(1)

 

 

(2)

 

 

(3)

 

 

(4)

 

 

(5)

 

 

 

(6)

 

 

Module Eight Homework Packet Page 2

 

Module 8: Solutions Chapter 13

Part B: Factors Affecting Rate of Dissolving    05 points

 

State two factors greatly affecting the solubility of a gas in a liquid and explain:

 

(1)  

 

 

(2)

 

 

 

What is the main factor affecting the solubility of a liquid in a liquid and explain the rule:

 

 

(3)

 

 

 

 

State four factors which governs the Rate of dissolving a solid in a liquid:

 

(1)

 

 

 

(2)

 

 

 

 

(3)

 

 

 

 

(4)

 

 

 

 

 

 

 

 

 

 

Module Eight Homework Packet Page 3

 

Part C: Writing Ionization Reactions  05 points

(Strong Acids/Weak Acids/Strong Bases/Weak Bases/

Soluble Salts and Oxides of Nonmetals and Metals)

 

Write the ionization reactions for the following:

(1) Strong Acid:  HCl (aq)

 

 

 

 

 (2) Weak Acid:  HC2H3O2 (aq)

 

 

 

 

 (3) Strong Base:  NaOH (aq)

 

 

 

  

 

(4) Weak Base:  NH3 (aq)

 

 

 

 

(5) Soluble Salts: NaCl (aq)

 

 

 

 

 (6) Oxides of Nonmetals:  CO2 (g)

 

 

 

 

(7) Oxides of Metals: CaO (s)

 

 

 

 

 

 

 

 

Module Eight Homework Packet Page 4

 

Part D: Solution Preparation Problems    05 points

 

1. How many grams of solute are needed to prepare 250 ml of a 0.0100 M KMnO4?

 

 

 

 

 

 

 

 

 

2.   20 grams of AgNO3 were placed in a 250 ml volumetric flask, calculate the Molarity of the Solution.

 

 

 

 

 

 

 

Part E: Solution Dilution/Concentration Problems   05 points

 

1. How many milliliters of a 12 M HCl (concentrated) are required to make 2.00 L of a 1.00 M HCl?

 

 

 

 

 

 

 

 

2. A stock bottle of concentrated nitric acid indicates that the solution is 67.0 HNO3 by mass and has a density of 1.40 g/ml.  Calculate the molarity of concentrated nitric acid.

 

 

 

 

 

 

 

 

 

 

 

 

Module Eight Homework Packet Page 5

 

Part F: Solution Reaction Problems    10 points

Acid-Base Neutralization (15 Points):

1. Calculate the molarity of a Calcium hydroxide solution if 18.50 mL of it requires 28.27 mL of a  0.0125 M HCl to reach its neutralization point.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REDOX Titration: (15 Points)

2. A KMnO4 (aq) solution is to be standardized by titration against As2O3(s), A 0.1156 g sample of As2O3 requires 27.08 mL of KMnO4. What is the molarity of the KMnO4?

 

As2O3   +    MnO4 1-  +      H2O     +    H1+  ------->      H3AsO4    +     Mn 2+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Module Eight Homework Packet Page 6

 

Module Eight: Part G Rewriting Equations Ionically           10 points

Rewrite the following (unbalanced) equations ionically, cancel spectator ions and then balance the net ionic reactions.  Show as ions: soluble salts and strong acids and strong bases; leave as molecules/formula units insoluble salts, weak acids, covalent molecules.

 

Strong acids are: Perchloric Acid; Hydrochloric Acid; Nitric Acid; Sulfuric Acid; Hydrobromic Acid; Hydroiodic Acid.

 

 Strong bases are Sodium hydroxide, Potassium hydroxide, Calcium hydroxide, Barium hydroxide and Strontium hydroxide

 

 

1.    KOH (aq)         +        HNO3(aq)     à          KNO3(aq)         +          HOH(l)

 

 

 

 

 

 

 

2.     CuSO4 (aq)     +      Na2CO3 (aq)   à         CuCO3  (s)     +          Na2SO4 (aq)

 

 

 

 

 

 

 

3.    NaOH (aq)    +     NH4NO3 (aq)   à       NaNO3 (aq)    +       NH3 (g)     +   HOH (l)

 

 

 

 

 

 

 

4.    BaBr2 (aq)   +      ZnSO4 (aq)        à        BaSO4 (s)        +      ZnBr2   (aq)

 

 

 

 

 

 

 

5.    Cr(OH)2 (s)   +   HCl   (aq)      à       

 

 

 

 

Module Eight Homework Packet Page 7

 

Module 8   Part H: Redox Equations    10 points

 

Balance the following redox equations written in net ionic form:

Acid Media: (5 points)

 

1.    C2O4 2- (aq)      +     MnO4 1- (aq)    + H 1+ (aq)  →  Mn 2+ (aq)  +    CO2 (g)   +   HOH (l)

 

 

 

 

 

half equation:

 

 

 

 

 

 

half equation:

 

 

 

 

 

 

Basic Media (5 points)

 

2.  Bi2O3 (s)   + OH 1- (aq) + OCl 1- (aq) →   BiO3 1- (aq)    + Cl 1- (aq)    +   HOH (l)

 

 

 

 

half equation:

 

 

 

 

 

half equation:

 

 

Module Eight Homework Packet Page 8

 

Part L:   pH Scale Calculations (Section 15.8-15.9)             5 points

What is the pH and pOH of the following solutions:

 

pOH = 14.00 – pH         Kw = 1.00 x 10-14  =  [H3O1+][OH1-]

 

 

 (1)        0.0100 M HCl

 

 

 

 

 

 

 

 

(2)         0.0055 M Mg(OH)2

 

 

 

 

 

 

 

 

(3)  The pH of vinegar is 2.85, calculate the [H3O1+]:

 

 

 

 

 

 

 

 

 

(4) Easy Off Oven Cleaner has a pH of 11.70. What is the [H3O1+] and [OH1-]?

 

 

 

 

 

 

 

 

Module Eight Homework Packet Page 9

Part K: Solution Definitions        5 points

Fill in the blank with word for the definition listed:

 

1.______________When dynamic equilibrium is established between undissolved solute in a

                              Solution, we say the solution is __.

 

2. ______________Any solution containing less solute than it could hold at equilibrium is said

                               To be a(n) _______________solution.

 

3. ______________That part of a solution which you are dissolving.

 

 

4. ______________That part of a solution which does the dissolving (or the media of the

                                solution).

 

5. ______________are dispersions in which that the dispersed matter has one or more

         dimensions  in the range of 1 to 1000 nm and has the unique ability to scatter light.

 

6. ______________of a solution is the number of moles of solute per Liter of solution.

 

 

7. ______________of a solution is the grams of solute per 100 grams of solution

 

 

8._______________of a solution is the milliliters of solute per 100 milliliters of solution.

 

9.______________homogeneous mixture of a solute and a solvent.

 

10._____________ .Any solution containing more solute than it could hold at equilibrium is said

                               To be a(n) _______________solution.

 

 Define Normality; define equivalent.

 

 

 

 

 

What is the difference between a solution, colloidal solution, colloidal suspension, and a suspension