Colligative Properties of Solutions

The video tutorial explains how to determine the altered boiling and freezing temperatures for 1 molal solutions of sodium chloride and glucose. It covers the calculation of freezing point depression and boiling point elevation using specific equations. For sodium chloride, the i value is 2 due to the dissociation into ions, while for glucose, the i value is 1 as it does not dissociate. The tutorial provides step-by-step calculations for both substances, highlighting the differences in their effects on water's boiling and freezing points.

What is the main focus of the problem discussed in the video?

• Calculating altered boiling and freezing temperatures

• Finding the solubility of salts

• Determining the density of solutions

• Measuring the pH of solutions

What is the i value for sodium chloride when it dissolves in water?

• 2

• 3

• 1

• 4

How is the change in boiling temperature for sodium chloride calculated?

• By subtracting the change from the normal boiling point

• By multiplying kb, molality, and i value

• By dividing the change by the normal boiling point

• By adding the change to the freezing point

What happens to glucose molecules when they dissolve in water?

• They evaporate

• They remain as whole molecules

• They form a new compound

• They break into ions

What is the i value used for glucose in boiling point elevation calculations?

• 2

• 1

• 3

• 0

What is the change in freezing temperature for a 1 molal glucose solution?

• 1.024 degrees Celsius

• -1.86 degrees Celsius

• -3.72 degrees Celsius

• 0 degrees Celsius

What is the new boiling temperature for a glucose solution after the change is calculated?

• 100 degrees Celsius

• 100.512 degrees Celsius

• 101.024 degrees Celsius

• 99.488 degrees Celsius

Why is the i value for molecular compounds like glucose always one?

• Because they remain as whole molecules

• Because they form multiple ions

• Because they evaporate

• Because they form new compounds

What is the normal freezing temperature of water?

• 1.024 degrees Celsius

• -1.86 degrees Celsius

• 100 degrees Celsius

• 0 degrees Celsius

What is the normal boiling temperature of water?

• 1.024 degrees Celsius

• -1.86 degrees Celsius

• 100 degrees Celsius

• 0 degrees Celsius