Chapter 21, Problem 55E

(a)

Interpretation Introduction

Interpretation: The boiling point and freezing point of the given solution of glucose in ethanol should be determined.

Concept Introduction:

The elevation in boiling point of the ethanol is calculated by using the formula,

Where,

• is the elevation in boiling point.
  
• is the van’t Hoff factor which describes the number of ions of solute particles in the solution.
  
• is the molality of the solution.
  
• is the molal boiling point elevation constant refer table 13.3)
  

The depression in freezing points of the ethanol solution is calculated by using the formula,

Where,

• is the depression in freezing point.
  
• is the van’t Hoff factor which describes the number of ions of solute particles in the solution.
  
• is the molality of the solution.
  
• is the molal freezing point depression constant refer table13.3)
  

(b)

Interpretation Introduction

Interpretation: The boiling point and freezing point of the given solution of decane in chloroform should be calculated.

Concept Introduction:

The elevation in boiling point of the ethanol is calculated by using the formula,

Where,

• is the elevation in boiling point.
  
• is the van’t Hoff factor which describes the number of ions of solute particles in the solution.
  
• is the molality of the solution.
  
• is the molal boiling point elevation constant refer table 13.3)
  

The depression in freezing points of the ethanol solution is calculated by using the formula,

Where,

• is the depression in freezing point.
  
• is the van’t Hoff factor which describes the number of ions of solute particles in the solution.
  
• is the molality of the solution.
  
• is the molal freezing point depression constant refer table13.3)
  

(c)

Interpretation Introduction

Interpretation: The boiling point and freezing point of the given solution of in water should be calculated.

Concept Introduction:

The elevation in boiling point of the ethanol is calculated by using the formula,

Where,

• is the elevation in boiling point.
  
• is the van’t Hoff factor which describes the number of ions of solute particles in the solution.
  
• is the molality of the solution.
  
• is the molal boiling point elevation constant refer table 13.3)
  

The depression in freezing points of the ethanol solution is calculated by using the formula,

Where,

• is the depression in freezing point.
  
• is the van’t Hoff factor which describes the number of ions of solute particles in the solution.
  
• is the molality of the solution.
  
• is the molal freezing point depression constant refer table13.3)
  

(d)

Interpretation Introduction

Interpretation: The boiling point and freezing point of the given solution of ethylene glycol and in water should be calculated.

Concept Introduction:

The elevation in boiling point of the ethanol is calculated by using the formula,

Where,

• is the elevation in boiling point.
  
• is the van’t Hoff factor which describes the number of ions of solute particles in the solution.
  
• is the molality of the solution.
  
• is the molal boiling point elevation constant refer table 13.3)
  

The depression in freezing points of the ethanol solution is calculated by using the formula,

Where,

• is the depression in freezing point.
  
• is the van’t Hoff factor which describes the number of ions of solute particles in the solution.
  
• is the molality of the solution.
  
• is the molal freezing point depression constant refer table13.3)