Lightbulb Moments

1. Review definitions of solution and electrolytes

2. Can you draw a particle diagram of the salt solution?

3. Can you create two different concentrations of salt solutions and qualitatively demonstrate this?

4. Can you mathematically show concentration difference and provide calculations to justify it?

Solution: A combination of two or more compounds in the same phase of matter.

Electrolytes: Ions that hold an electrical charge when dissolved in an ionizing solvents. 

Yes, you can create more than one concentration of salt solutions. Add varying amounts of salt or water to a constant level of water or salt. It can be proved qualitatively by using a lightbulb electricity thingie (which I do not know the name of), shown below. 

You can show mathematically the difference, yes. Unfortunately, due to the extremely low molarity of the less concentrated solution, and the lack of a large enough beaker, my group didn't get the data for the second set of calculations. The first ones are fine, though!

Na: 22.99

Cl: 35.45

NaCl: 58.44 g/mol 

2.5 g NaCl, 100 ml of H2O:

2.5 g NaCl x 1 mol NaCl/58.44 g NaCl = .0428 mol NaCl/.1 L H2O = .428 M

If the second set gad been completed, the molarity for that would be smaller than .428 M.