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list of experiments
Solubility book (3rd Edn)
Organic Chemistry: Open Notebook Science Solubility Challenge
Acetanilide in Acetone
Harmful if swallowed or inhaled. Causes irritation to skin, eyes, and respiratory tract. May cause cyanosis.
Extremely flammable liquid and vapor. May cause flash fire. Harmful if swallowed or inhaled. Causes irritation to skin, eyes, and reparatory trace. Affects CNS.
Methods and Materials
25 mL of acetone
5 g of acetanilide
100 mL graduated cylindar
4 medium sized test tube
10 mL graduated cylindar
Small scoop for adding solute to solvent
25 mL beakers
100 mL beaker
Be sure to clean all glassware before beginning experiment
All mass measurements should be made using a scale
1) Obtain 25 mL of acetone using a 100 mL graduated cylinder and approximately 5g of a acetanilide by taring a watch glass on a scale.
2) Measure approximately 5 mL of acetone into a 10 mL graduated cylinder and add the 5 mL into a medium sized test tube. Perform this step four times in order to have 4 medium sized test tubes that contain 5 mL of acetone.
3) Begin adding acetanilide to the test tube using a metal scoop and stir the mixture by shaking the test tube while taking care not to spill any of the solution.
4) When the solute fails to mix with the solvent stop adding solute. At this point, repeat step 3 and this step until all test tubes have been used.
5) Centrifuge all four test tubes the saturated solution for approximately 3 minutes.
6) After confirming that the solution is completely saturated pour the contents one test tube into a 10 mL graduated while trying to keep any extra solute in the test tube.
7) Record\measure the volume of the saturated solution and measure\record the mass of a 25 mL beaker.
8) Pour the saturated solution into the previously measured beaker and measure\record the mass of the beaker with the saturated solution. Return to step 6 and complete the other three test tubes.
9) Construct a hot water bath using a hot plate and 100 mL beaker.
10) Place the beakers into the hot water bath and allow the solvent to evaporate. Remove the beakers from heat as soon as the solvent has evaporated.
10) Measure\record the mass of each beaker with the remaining solute.
11) Allow the four beakers to sit open for 1-3 days and then measure\record the mass of the beaker.
12) Calculate the solubility of the solute in the solvent.
Table 1: Experimental Measurements and Calculations
Mass of evaporation vessel, g
Volume of sat. solution, mL
Mass of evaporation vessel and sat. sol., g
Mass of evaporation vessel and solute before sitting for day, g
Mass of evaporation vessel and solute after sitting for one day, g
Mass of solute after evaporation, g
Mass of solution, g
Solubility using volume of solution, g/mL
Moles of solute
Solubility, g/100g solvent
Table 2: Calculated Averages
Average solubility g/100g solvent
Average concentration moles/L
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