Mixing and Dissolving - Chemicals and Chaos

Today in chemicals and chaos we were learning about mixtures and the huge vocabulary of words involved with this subject. We had the pre-test to see what we already knew about mixtures and I got 94% out of 100%. After we did the pre-test we learned a little about it and after that, we did an experiment with sugar and water.

What is a mixture?
A mixture is a substance made by combining different substances together.

What is dissolving?
Dissolving something is when you are making the substance part of the mixture.

How could you speed up dissolving?
You could use hot water, Use a fine powder, or stir it in.

Can everything dissolve?
Soluble - Something that can dissolve in water.
Insoluble - Something that can not dissolve in water.

EXPERIMENT - 

Equipment - 
50ml of cold water + 1 spatula sugar x2
50ml of warm water + 1 spatula sugar x2

Method - 
1. Add one spatular of sugar into the cold water and mix until dissolved making sure to time it from when you first put it into when it is finished dissolving.
2. Add one spatular of sugar into the warm water and mix until dissolved making sure to time it from when you first put it into when it is finished dissolving.
3. Add one spatular of sugar into the cold water and leave it making sure it is not disturbed and wait until it is dissolved making sure to time it from when you first put it into when it is fully dissolved.
4. Add one spatular of sugar into the warm water and leave it making sure it is not disturbed and wait until it is dissolved making sure to time it from when you first put it into when it is fully dissolved.

Serial Dilution - Chemistry

AIM: 

The aim of this experiments is to create a serial dilution.

HYPOTHESIS: 

It will become less consentrated as it goes down the line..

Method: 

Start of by collecting 6 test tubes. In the first test-tube, put 10mls of water. With the other 5 test tubes, fill them all up with 5ml of water. After that, start by adding in a piece of potassium permanganate into test tube 1 with the 10mls. Move 5mls of solution 1 into test tube 2 and 2 into 3 until it has ended up with 5 going into 6. By that time you should notice the different shades as the potassium permanganate starts diluting and becomes overcome with the water there for making it a lighter and less concentrated solution as it goes down the line.

Conclusion: The start tube was the most concentrated because it had less water causing it to have more of the potassium permanganate particals. as you went down the line the potassium permanganate started becoming more diluted as the water makes itself more present. 

Particles and Diffusion - Chemistry

Today in Chemistry, we are learning about Particle Theory and Diffusion. Particles are apart of our everyday life for particles are what makes everything. All of the particles are put into 3 groups of matter, Solid, Liquid, and Gas. Particles in each state of matter move differently and give matter a different property's. Diffusion is were you are mixing the particles of say a solid and a liquid so they move from a high concentration to a low concentration.

AIM: To investigate the effect of temperature on rate of diffusion.

Hypothesis - I think that the warm water will diffuse faster than colder because hot water is easier to devolve things with.

Method - 

Dish 1 has cold water 

Dish 2 has warm water 

We put the same amount of Potassium Peregrinate in each of them.

Conclusion - 

The warm water spread faster than the cold when they went in. This happened because the hot water had more energy than the cold water making the particles move faster than the colder ones. It is like how when you put hot chocolate powder in your warm water and it dissolves vs when you put it in the cold water and you have to mix it thoroughly before it dissolves completely.