Separating Solutions

Create a new blog post titled, “Separating Solutions”
Categorize it in POM and Science
Make sure to have the following in the post:
Lab # 2 Questions: Answer the following questions onto your blog post…
1. Describe the physical properties of the substance that remains in the evaporating dish.

It is flakey and looks thin, It looks a little bit different from salt, but is the same.

2. Where is the water that was in the salt water solution?

It evaporated into the air.
3. What do you think the substance is that remained in the evaporating dish?

Salt
4. What could you do to identify the substance?

Compare it to like substances and find the physical properties.

Activity 4 Follow up Questions about the reading and the whole Separating Solutions section
1. Explain why scientists would classify cereal as a heterogeneous mixture.

Because you can easily separate the mixture.

2. After a minor traffic accident, the police noticed that a solution had spilled and run off

the roadway onto the shoulder of the road. Describe how you could recover a

sample of this solution from the dirt, rocks, and sand on the road’s shoulder.

You could filter the solution out of the rock and dirt mixture.

3. When a scientist mixed together a number of substances, light, heat, and gas were

produced. The scientist could not separate the new substance using physical

properties like solubility, density, or color. Did the scientist create a mixture, or did

she produce something else? Explain how the product she produced was like and/or

different from the homogeneous and heterogeneous mixtures you have used.

They produced a compound because you can’t even separate the mixtures without another chemical reaction.

Boiling Point Post #2

  1. At what temperature does water boil?
It depends on what altitude you are at. Below seas level, water boils at about 120 degrees celsius, At Mount Everest Base Camp water boils at about 80 degrees celsius, and a little bit above sea level, it boils at about 100 degrees celsius. This is because the higher up you are, the lower the air pressure is. Pressure makes the water boil slower because it pushes down on the molecules, keeping them more compact.
  1. What effect, if any, does the amount of water in the beaker have on the boiling temperature of water? (Look at the class Google doc where everyone has entered their data to help with this question)
It has no effect because all water boils at the same temperature. We did two different experiments, one with 500 mL of water and ice and one with 300 mL of ice. In both of our experiments, the water boiled at about 90-100 degrees.
  1. Does the temperature of the boiling water increase, decrease, or remain the same after the water has boiled for two minutes? If there was a change, why do you think so?

It will stay about the same, but maybe change by .1 or something small. The only reason the temperature might change is because a tiny bit of the energy and molecules are being let out as gas. But it will not change that much.

 

Sink Or Float Lab

 

We graphed our data that we collected from our displacement lab and we graphed it on the app grapher. We made a key so that you can see which each color meant and color coded them. In grapher, we had to label the x as mass and y axis as volume. Then we had to create a new do plot and we put in our volume and mass. We also graphed the density of water so that you could compare the other densities to it. Grapher was a very easy application and I do recommend you try to use it.