Separating a Mixture using Evaporation

 Separating a Mixture using Evaporation:

Aim:

Hypothesis: they will crystalize

Equipment: Copper sulfate solution, 250mL Beaker, heatproof mat, evaporating basin, element. 

Method: 

1. Set up element

2. Add 100mL of hot water to the beaker and place on the element.

3. Add copper sulfate to the evaporating basin until it is quarter full.

4. Carefully, place the evaporating basin on top of the beaker. 

5. Turn on the element to 3

6. Heat the solution until most of the solvent has been evaporated and crystals of solute are forming. 

7. Turn off the element - careful not to touch as will be hot for a long time.

Observations:

We started off by putting the beaker on the element, with the evaporating basin that had Copper sulfate solution inside. It took time for the water to start boiling but once it did, it had a nasty smell to it. Steam started coming out so we turned off the element and let it sit.

The solution started crystalizing.

Conclusion:

Discussion:

Evaluation:

Can Experiment

 Can Experiment

Aim: To see what happens when you put a heated can in cold water

Hypothesis: The can will get squashed when put into the cold water

Equipment:

• Cold & Hot Water
• Can
• Element
• Ice Cream Container
• Tongs

 Method:

1. Fill the can with hot water, about a quarter way
2. Fill the Ice Cream Container with cold water, ice-cold water if possible.
3. Put the can on top of the hot water and wait for it to steam.
4. Once it starts to steam put it straight into the Ice Cream Container that is filled with Cold Water
5. Pop!

Results:

My groups experiment did exactly what it was supposed to do on the first try.

The can was squished when it hit the cold water.

Discussion: 

Before heating, the can is filled with water and air. When boiling the water, the water changes states from a liquid to a gas (Water Vapor) The water vapor pushes the air that was originally inside the can out into the atmosphere. When the can is turned upside down and placed in the water, the mouth of the can forms an airtight seal against the surface of the water in the bowl. In just a split second, all of the water vapor that pushed the air out of the can and filled up the inside of the can turns into only a drop or two of liquid, which takes up much less space.