Effects of Solutes on Boiling Point and Freezing Point
Salt is added to icy roads in the winter and salt is often added to boiling pasta water.
We will examine why each of these are done.
We will examine why each of these are done.
Effect of Solute on Vapour Pressure
Recall, evaporation is a type of vaporization that occurs on the surface of a liquid. If a liquid is placed into a closed container, it will reach equilibrium between evaporation and condensation. At equilibrium the pressure created by the vapour is called vapour pressure (Pvap).
Watch the following videos and make notes on the following.
How does a solute effect vapour pressure? Boiling Point? Freezing Point? Osmotic Pressure? Explain.
How do Electrolytes and Non Electrolytes effect the colligative properties?
Watch the following videos and make notes on the following.
How does a solute effect vapour pressure? Boiling Point? Freezing Point? Osmotic Pressure? Explain.
How do Electrolytes and Non Electrolytes effect the colligative properties?
Note: These next 2 videos will explain why boiling point elevation and freezing point depression occur. She goes further then necessary when she explains how to quantitatively calculate the amount of increase or decrease. However, if you are interested I suggest checking it out to get a deeper understanding!
Effect of Solute on Freezing Point and Boiling Point
Now that you know solutes effect on vapour pressure predict how its effect on boiling point and freezing point.
Receive the lab handouts below from your teacher.
We will be completing these labs tomorrow so make sure you have completed your prelab work! Draw pictures of each step, record a question you want to answer through doing the lab, and make a hypothesis.
Lab 1: The Effect of Antifreeze on the Boiling Point of Water
Lab 2: Heat Transfer: I Scream, You Scream, We All Scream for Ice Cream
Lab 3: The effect of Salt on the Melting Point of Ice
After completing the labs you should be able to answer the following questions:
1. Define Boiling Point elevation.
2. Define Freezing Point Depression.
3. What is the purpose of putting salt on the roads in the winter?
4. Why do cooks add salt to the water when they are boiling pasta?
Receive the lab handouts below from your teacher.
We will be completing these labs tomorrow so make sure you have completed your prelab work! Draw pictures of each step, record a question you want to answer through doing the lab, and make a hypothesis.
Lab 1: The Effect of Antifreeze on the Boiling Point of Water
Lab 2: Heat Transfer: I Scream, You Scream, We All Scream for Ice Cream
Lab 3: The effect of Salt on the Melting Point of Ice
After completing the labs you should be able to answer the following questions:
1. Define Boiling Point elevation.
2. Define Freezing Point Depression.
3. What is the purpose of putting salt on the roads in the winter?
4. Why do cooks add salt to the water when they are boiling pasta?