Expansion

Expansion:

Applying heat


Contraction:

cooling down


-Aim: To observe contraction in gases.


-Hypothesis: I think the water gonna evaporate and the can would cool down.

conduction

Teabag rockets 

Today we learned about Convection in chemicals class and we did an experiment called teabag rockets.

Aim:

 To observe convection in real life.

Equipment: 

Teabag without tea, lighter.

Method:

First of all, we have to empty the teabag and set it up and use the lighter to fire it.

Result: 

The teabag was flying on the air and it's because the particles are spreading out cause its hotter and it makes fly and that called convection.

Thanks and hope you have cool day.

Diffusion

Diffusion: Diffusion is the movement of a substance from an area of high construction to the area of low construction.


Aim: To observe diffusion in a liquid.


Equipment: Petri dish, water, tweezers, a crystal of potassium permanganate.


Method: 

1. Half fill your petri dish with cold tap water.
2. Place the petri dish on your workbench and allow the water to become settled.
3. Using the tweezers, place a single crystal of potassium permanganate in the center of the petri dish.
4. observe for 5 minutes.
5. Repeat the experiment using hot water.

Result:

In cold water: Diffused slower 

In warm water: Diffused faster 


Discussion: hot diffused faster and heat of the water made the particles break apart faster, and because cold is thicker it made the particles break apart slower.

Matter

Matter:

The matter is almost everything around you, everything that has mass or takes space is matter.

the different state of matter:

solid: particles are not moving 

Liquid: particles move not to fast 

Gas: Particles move quickly. 

Solid to liquid:  melting 

gas to liquid: condence

liquid to gas: evaporating 

liquid to solid: freezing 

Distillation

                         Separating a mixture suing distillation  


Aim: To separate a solute from a solvent in a solution using distillation.

Hypothesis:

I think its gonna evaporate and I think there would be no sugar.


Equipment:

• A solution of saltwater 
• Conical flask 
• heatproof mat
• a delivery tube and bung 
• Bunsen 
• Burner 
• tripod 
• gauze mat 
• retort stand 
• boss head and clamp 
• boiling tube 

Method: 

1. Set up the equipment as shown in the diagram.

1.  Add approximately 50 mL of saltwater to your conical flask.

1.  Light your Bunsen burner. Open the air hole and gently push the Bunsen burner under the tripod.

1.  heat the solution until most of the solvent has been evaporated. Turn off your Busen burner.

Result: The coke was boiling because the heat was under the beaker and the water of the coke was evaporating from sugar and left the sugar behind.

Discussion:  first we put the coke on the heat and then when the coke started boiling and then it made bubbles and then the coke started evaporating and the liquid in the boiling tube was so clear and that called condense.


Conclusion: I was wrong because the water turned to gas and the sugar left behind.