Evaporation Experiment

Hello everyone today we are doing evaporation while doing the experiment we are looking at the changes in the water and also see the evaporating basin. The experiment was fun because we used bunsen burner, I had to lit a fire by a lighter. The water was condensing, steaming, boiling and evaporating. At the bottom are the aim, hypothesis and the equipment used. 

Separating a Mixture using Evaporation:

Aim: why you are doing the experiment

To separate a solution into a solvent and solute using evaporation.

Hypothesis: what you think will happen, and why….

I think it will heat up and the copper sulfate will leave some crystal at the sides.

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- be careful not to touch, as it will be hot for a long time.

Observations: What did you see, hear etc when doing the experiment.

The boiling was loud so you could hear the boil of the water and also you can hear the gas.

Conclusion: Was your hypothesis correct?

yes, the crystal stayed and it has some a little bit of kinda glitter.

Discussion: What happened and why… using your scientific keywords (Evaporating, Solvent, solute, solution, mixture, heat, boil) The water started boiling because of the heat and while it was boiling the steam started coming out of the beaker. When it

Evaluation: Did you enjoy the experiment? Why? What would you do differently next time? 

I enjoyed it because I'm learning something new and I had fun with my group but some people in our group sometimes don't really do anything so I would like to change it.

Copper sulfate is poisonous

KEYWORDS:

-Evaporating

-Solvent

-Solute

-Solution

-Mixture

-Heat

-Boil

Here are the pictures that we took.

Hurumanu 3 - Chemistry Mixing and dissolving

 Hello everybody, so today we are learning about Mixing and dissolving, we have to find how who move faster in what temperature. 

What are the ideas from today? The idea for today is to mix and dissolve or to know what temperature to dissolve the sugar first. 

What factors effect dissolving?

Experiment: Aim, method, result

Aim: Rate of dissolving depending on temperature and stirring. 

Method: In this experiment, we have to have 2 beakers one is small and one is big. We also need a spatula to put the sugar in the water and also for mixing. The first one we did was to put the big beaker cold water and this has to be in 50ml, We have to stir it, We also have to time it the same as we put the sugar and stop when the sugar has dissolved. The second one is the same thing but we have to put hot water, it also has to have the same water as the first one and the amount of sugar we put. The third one is the first one but we can't stir it. The fourth one is the same as the second one but we also don't need to stir it.

Total and average time: Coldwater + mixed= (total) 490sec (average) 70sec |  Hot water + mixed=(total)  213sec (average) 27sec | Coldwater + No stirring=(total) 622sec (average) 24.4sec |  Hot water + No stirring= (total) 590sec (average) 98sec

Why the result happened? 

The hot water gives more energy to the particle and moves around more and the cold water make it slower and that's why the cold water is taking a long time to dissolve.