EXP247

=Researcher= Matthew McBride =Objective= The purpose of this experiment was to determine whether a 5M solution of trans-cinnamic acid in THF was miscible at room temperature (20C). =Procedure= Cinnamic acid (3.7100g) was transferred to a 5mL volumetric flask and the flask was filled with THF. The flask was inverted several times to throughly mix the solution and it was observed whether there was any solid cinnamic acid that remained undissolved in the solution. =Results= There was a substantial layer of the solid cinnamic acid that remained undissolved in the solution after the solution was throughly mixed at room temperature (20C). =Discussion= This experiment was conducted at the same time as EXP246. The results of this experiment determined that the solubility of cinnamic acid in THF had to be under 5M and the results of EXP246 further determined that the solubility was under 3M. These values are in agreement with the [|predicted solubility value] of 2.824M. Experiments finding a solubility of cinnamic acid in THF are listed [|here]. =Conclusions= A 5M cinnamic acid solution in THF was not miscible and consequently, the solubility of cinnamic acid in THF must be less than 5M. =Log=

2012-01-11
11:16 The temperature in the lab was 20C. 11:16 The weight of the empty 5mL flask was 13.5847g. 11:24 3.7100g of the cinnamic acid was weighed on the analytical scale and transferred to the 5mL volumetric flask. 11:41 The 5mL flask was filled with THF, capped and inverted several times. The cinnamic acid was observed to entering the solution quickly. 11:43 There was a substantial amount of the solid cinnamic acid remaining in the solution that did not dissolve into the THF.