Question: need procedure part Part C Separating Components of a Solution In the previous two sections, we separated components that were both solids. In this case,
need procedure part
Part C Separating Components of a Solution In the previous two sections, we separated components that were both solids. In this case, we want to attempt to separate components of a solution, i.e., the solvent from the solute. In your lab, you will have three solutions of sodium chloride, each containing different concentrations. The steps for the separation will be the same for all three. Into a graduated cylinder, measure out approximately 15 mL of the NaCl solution. Carefully transfer the solution to a pre-weighed evaporating dish, making sure none of the solution splashes or spills outside of the dish. Set the evaporating dish onto a wire gauze using a ring stand and set up a Bunsen burner beneath it. You may get assistance from your TA with the Bunsen burner. The flame of the Bunsen burner needs to only be strong enough to heat the water to evaporate, but you should be careful not to let it boil aperessively. If you do, the water may splash out of the dish, and you will not get an accurate mass at the end of the experiment. Once most of the water has evaporated, it may be helpful to place a beaker underneath the evaporating dish. If you do this, please be sure to turn the Bunsen burner off first to avoid injury. Once the beaker is securely underneath the evaporating dish, you may reignite the Bunsen burner and resume heating. This should be sufficient to evaporate the remaining moisture. If most of the water has evaporated but you can still hear a sizzling sound, you may move the evaporating dish back onto the wire gauze for just a few more minutes to allow the remaining water to evaporate. Once you are done, turn off the Bunsen burner and allow the dish to cool. Using a pre-weighed weigh boat, transfer the salt and record its mass. You should then be able to calculate the concentration of the solution. Repeat this process for the remaining solutions. When you are done, dispose of the salt into the waste container