
Concept explainers
(a)
Interpretation:
The boiling and freezing points of a solution containing
Concept introduction:
Solutes which give conducting solutions on dissolution are called electrolytes. Those which dissociate completely in the solution are known as strong electrolytes. Solutes which do not give conducting solutions are called nonelectrolytes. The properties which depend on the number of solute particles are known as colligative properties. Some of these properties are boiling point, freezing point and osmotic pressure.

Answer to Problem 7.67E
The boiling and freezing points of a solution containing
Explanation of Solution
The formula to calculate number of moles of solutes is given below as,
The molar mass of
Substitute the values in the above equation as follows.
The formula to calculate molarity is given below as,
Substitute the value of number of moles of solute and volume of solution in the above equation as follows.
The formula to calculate boiling point is given below as,
Where,
•
•
•
Since
Substitute the value of
Now, the boiling point of water solution can be calculated by adding value of
The formula to calculate freezing point is given below as,
Where,
•
•
•
Since
Substitute the value of
Now, the freezing point of water solution can be calculated by subtracting value of
The boiling and freezing points of a solution containing
(b)
Interpretation:
The boiling and freezing points of a solution containing
Concept introduction:
Solutes which give conducting solutions on dissolution are called electrolytes. Those which dissociate completely in the solution are known as strong electrolytes. Solutes which do not give conducting solutions are called nonelectrolytes. The properties which depend on the number of solute particles are known as colligative properties. Some of these properties are boiling point, freezing point and osmotic pressure.

Answer to Problem 7.67E
The boiling and freezing points of a solution containing
Explanation of Solution
The formula to calculate number of moles of solutes is given below as,
The molar mass of sugar can be calculated as follows.
Substitute the values in the above equation as follows.
The formula to calculate molarity is given below as,
Substitute the value of number of moles of solute and volume of solution in the above equation as follows.
The formula to calculate boiling point is given below as,
Where,
•
•
•
Since sugar is a nonelectrolyte, it will not dissociate in the solution and the value of
Substitute the value of
Now, the boiling point of water solution can be calculated by adding value of
The formula to calculate freezing point is given below as,
Where,
•
•
•
Since sugar is a nonelectrolyte, it will not dissociate in the solution and the value of
Substitute the value of
Now, the freezing point of water solution can be calculated by subtracting value of
The boiling and freezing points of a solution containing
(c)
Interpretation:
The boiling and freezing points of a solution containing
Concept introduction:
Solutes which give conducting solutions on dissolution are called electrolytes. Those which dissociate completely in the solution are known as strong electrolytes. Solutes which do not give conducting solutions are called nonelectrolytes. The properties which depend on the number of solute particles are known as colligative properties. Some of these properties are boiling point, freezing point and osmotic pressure.

Answer to Problem 7.67E
The boiling and freezing points of a solution containing
Explanation of Solution
The formula to calculate number of moles of solutes is given below as,
The molar mass of ethylene glycol can be calculated as follows.
Substitute the values in the above equation as follows.
The formula to calculate molarity is given below as,
Substitute the value of number of moles of solute and volume of solution in the above equation as follows.
The formula to calculate boiling point is given below as,
Where,
•
•
•
Since octanoic acid is a nonelectrolyte, it will not dissociate in the solution and the value of
Substitute the value of
Now, the boiling point of the solution can be calculated by adding value of
The formula to calculate freezing point is given below as,
Where,
•
•
•
Since octanoic acid is a nonelectrolyte, it will not dissociate in the solution and the value of
Substitute the value of
Now, the freezing point of solution can be calculated by subtracting value of
The boiling and freezing points of a solution containing
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Chapter 7 Solutions
Study Guide with Student Solutions Manual for Seager/Slabaugh/Hansen's Chemistry for Today: General, Organic, and Biochemistry, 9th Edition
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