Question

http://k12.http.internapcdn.net/k12_vitalstream_com/CURRICULUM/925245/CURRENT_RELEASE/HS_CHEM_S2_02_03_100_solution_formation.html

1. On the basis of your results, what is the relationship between the temperature of the solvent and the rate of solution formation?

2. Describe in a step by step manner how you determined the identity of the two unknowns. Discuss both what you determined the unknowns to be and the method that you used to find them.

3. Use your knowledge of collision theory to explain the results of your experiments in this laboratory.

*Please help, I will give medals*

Answer 1

temperature is in direct relation to rate of solution formation, ie the higher the temperature the greater solution formation

Answer 2

and what kind of witchcraft is this?! virtual lab?! are they affraid you will get dirty or what?! blasphemy i tell you!!!

Answer 3

Well I do online schooling so I don't have a choice really.

Answer 4

did you block me?

Answer 5

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Answer 6

so i dont get second task... can you describe what, how, where...

Answer 7

Part 1: Setup
Create two data tables with the following columns: Temperature of solution (°C), Amount of solute (g). You will use one table for potassium chloride (KCl) and one table for potassium chlorate (KClO3).
Part 1: Procedure
1. At Station 1, repeat the procedure steps from the tutorial for Beakers B, C, and D. (The steps that follow repeat the procedures steps from the tutorial.)
2. Lift Beaker B and place it on the lab bench.
3. Use the thermometer to measure and record the temperature of the water sample.
4. Using a measuring scoop, place amounts of KCl in the water. The scoops are 1 g and 5 g: Use the 5 g scoop to put in amounts that result in being close to saturated, and use the 1 g scoop when close to the saturation point.
5. When close to what you suspect to be the saturation point, observe some sediment on the bottom of the beaker. At that time, use the 1 g scoop and stir after each scoop.
6. Record the temperature of the solution and the amount of KCl needed to saturate the solution.
7. Repeat the Steps 2–6 using Beaker A at Station 2. Note that the solute is table potassium chlorate (KClO3), not KCl.
8. After you have completed the trials at both stations, create a graph showing mass of solute vs. temperature for Solution A titled Solubility Curve for KCl.
9. Repeat Step 8 for Solution B. These curves for Solution A and Solution B will be used in the Part 2 of the lab. You may wish to repeat the data collection in Part 1 two or three times and average your results, developing the best curves possible.
Part 2: Setup
Create a data table with the following columns: Solution, Temperature at which solute first observed (°C), Solute identity. In Solution column, make one row A and the other row B for each sample from Part 1.
Part 2: Procedure
1. At Station 3, remove Beaker A from the hot plate.
2. Place the thermometer into the beaker.
3. Repeat Steps 1 and 2 for Beaker B.
4. Over time, the water will cool and the amount of solute able to remain in solution will decrease. Record the temperature at which the solute begins to appear in each solution in the data table.

This is what you have to do I guess.

Answer 8

and did you do it? do you have data? if so then i guess you just need to get the temperature at witch precipitate occurs and compare to those twho graphs and witch one hits the curve at that temperature is the one you have to identify...

Answer 9

See I have no idea what that even means. I don't understand any of this.

Answer 10

do you have sugar at home? you can do the same with sugar and salt...
basicaly what it tells you to take KCl and keep adding and mixing until it cant dissolve any more, when there is a bit of crystals left on bottom of glass you came to saturated solution at that temperature, then you heat it up and add more until same happens and you came to saturated solution at that higher temperature.. you keep that up until you come to boiling point of water and your max saturation, you plot that data on graph and move on to second chemical and repeat the process
you need to get data like this:
http://chemicals.etacude.com/p/more/kcl.html

Answer 11

and after you done that you probably have some "unknow" substance which you add to heated water untill you reach saturated solution and after that you let it cool and at which temperature crystals start forming you take note of that temperature and look at your graphs and at that temperature which one has max solubility ie saturated solution is the "unknown" substance

Answer 12

I'm sorry but I am trying and I just don't understand anything about the unknown substances, saturated solution, I dont know what it is that the questions are asking me.

Answer 13

ok lets start from begining...
do you know what atoms and molecules are?

Answer 14

Yes, i also know that atoms join together to form molecules.

Answer 15

thats good now that you know that you also probably know that crystals are solids right?
and knowing that you know that atoms when sorted in some sort of cubes form solids right?

Answer 16

sorted in some sort of cubes? but yes I know crystals are solid.

Answer 17

in case of KCl you take one K atom and put it in one corner of a cube and you put Cl and put it in next corner of same cube