How would you prepare a supersaturated solution of CuSo4 in 100ml of water
I know this isn't the answer you want but the best answer I have is to add more CuSO4 to the solution that the solvent will dissolve. If you want numbers you must provide the solubility of CuSO4. I don't know of anyone that has all of the solubilities of various salts memorized; certainly I don't.
To prepare a supersaturated solution of CuSO4 (copper sulfate) in 100ml of water, follow these steps:
1. Measure out 100ml of water using a graduated cylinder or a measuring cup.
2. Heat the water in a glass beaker or a heat-resistant container. Heating the water will increase its ability to dissolve the CuSO4 salt.
3. Gradually add small amounts of CuSO4 powder to the heated water while stirring continuously. Make sure to add the powder slowly to prevent it from clumping.
4. Keep adding CuSO4 powder to the water and stirring until no more salt will dissolve. At this point, the solution is saturated.
5. Continue heating the solution while stirring until it reaches its boiling point. The boiling point of the solution is higher than that of pure water due to the presence of dissolved salt.
6. Once the solution reaches its boiling point, remove it from the heat source and allow it to cool down slowly. It is essential to cool the solution slowly to maintain the supersaturation.
7. Avoid disturbing or agitating the solution during the cooling process. This will allow the excess CuSO4 to remain dissolved, creating a supersaturated solution.
8. Once the solution has cooled completely, it should be a supersaturated solution of CuSO4.
It's important to note that supersaturated solutions are unstable and can easily return to a saturated state or crystallize if disturbed or if a seed crystal is introduced. Handle the solution delicately to preserve its supersaturation.