Hi all, in this science lab work, our class touched on solutes and solvents. Hope you will like it.

Aim: To find out if the solubility of different solutes differs in the same solvent.
Apparatus:1)beaker,2)Glass rod, 3)Electronic balance
Materials:Baking soda, copper sulfate, salt, iodine crystals

Independent variable: Type of solute
Dependent variable: Solubility of solutes
Controlled variable:Mass of solute added at every interval, type of solute, temperature of the solvent, volume of solvent

Procedure:
1)Measure 20 cubic centimeters  of water into the beaker.
2)Add 1.0g of common salt(which has been weigh out by teacher) to the water.
3)Stir to dissolve the common salt in the water. If it dissolves completely, add another 1.0g of salt.
4)Continue adding 1.0g of salt until no more will dissolve after stirring. Measure the total mass of salt added.
5) Repeat steps 1-4 using baking soda, copper sulfate and iodine.

This video is copper sulfate solution done by teacher.

This is done by me and my desk mate with salt.

After this long experiment, this is the results we obtained.

  

With this results, this is our conclusion that the solubility of different solutes in the same solvent is different.