SOLUTIONS MANUAL FOR
LABORATORY MANUAL FOR
GENERAL ORGANIC AND
BIOLOGICAL CHEMISTRY 3RD
EDITION TIMBERLAKE
, Laboratory Manual for General Organic and Biological Chemistry 3rd Edition Timberlake Sol
Date Name
Section Team
Instructor
Pre-Lab Study Questions 14
1. Why does an oil-and-vinegar salad dressing have two separate layers?
Salad dressing forms layers because oil is not soluble in water. This causes a
heterogeneous mixture, which is seen as two separate layers.
2. What is meant by the mass percent (m/m) concentration of a solution?
It describes the grams of solute in the grams of solution multiplied by 100.
3. What is molarity?
It is a concentration unit. It is the moles of solute in the liters of solution.
4. Why are some electrolytes considered strong, whereas others are considered weak?
Strong electrolytes, such as strong acids, form many ions in solution.
Weak electrolytes, such as weak acids, form few ions in solution.
5. A solution is prepared with 3.26 g KCl and water to make 25.0 mL of KCl.
a. What is the % (m/v) of the KCl solution?
b. What is the molarity (M) of the KCl solution?
Copyright © 2014 Pearson Education, Inc.
Visit TestBankDeal.com to get complete for all chapters
LABORATORY MANUAL FOR
GENERAL ORGANIC AND
BIOLOGICAL CHEMISTRY 3RD
EDITION TIMBERLAKE
, Laboratory Manual for General Organic and Biological Chemistry 3rd Edition Timberlake Sol
Date Name
Section Team
Instructor
Pre-Lab Study Questions 14
1. Why does an oil-and-vinegar salad dressing have two separate layers?
Salad dressing forms layers because oil is not soluble in water. This causes a
heterogeneous mixture, which is seen as two separate layers.
2. What is meant by the mass percent (m/m) concentration of a solution?
It describes the grams of solute in the grams of solution multiplied by 100.
3. What is molarity?
It is a concentration unit. It is the moles of solute in the liters of solution.
4. Why are some electrolytes considered strong, whereas others are considered weak?
Strong electrolytes, such as strong acids, form many ions in solution.
Weak electrolytes, such as weak acids, form few ions in solution.
5. A solution is prepared with 3.26 g KCl and water to make 25.0 mL of KCl.
a. What is the % (m/v) of the KCl solution?
b. What is the molarity (M) of the KCl solution?
Copyright © 2014 Pearson Education, Inc.
Visit TestBankDeal.com to get complete for all chapters
