Researcher

[Add you full name for all experiments. -AL]

Objective

Confirm that the density method can measure solubility for benzoic acid and methanol.

Procedure


Results

EXP168 Sheet 1

Discussion

[Do the results make sense? JCB]
[The density of methanol at different temperatures is noted here
and are off enough from the Wikipedia value that I recommend you use your pure solvent measurement as your 0M datapoint. JCB]

[If you have the results accurate to 0.1 mg update the spreadsheet - otherwise you'll have to redo this experiment JCB]

Conclusion


Log

10:13 - empty volumetric flask weighed on scale.[report number - or create column in spreadsheet and add there JCB]
10:15 - 1 mL methanol was added into the volumetric flask by pippet and then weighed on scale. [Define sample number in the log here - according to your spreadsheet this is sample 1 JCB]
10:50 - .307 mg Cinnamic Acid was measured out. [I assumed you meant 30.7 mg and added in sheet - again define sample number 2 here JCB]
10:55 - .307 mg Cinnamic Acid was added to volumetric flask.
10:56 - Methanol was added to solvent to make a 1 ml mixture. Mixture was then mixed by hand for 30 seconds. [note if it all went into solution JCB]
10:58 - Sample 1 mixture was weighed on scale. [isn't this sample 2? JCB]
11:00 - .62 mg Cinnamic Acid was measured out and added to empty volumetric flask. [Again you mean 62 mg and not 0.62, right? Why do you have 0.1 mg accuracy above and only 1 mg accuracy here? JCB]
11:03 - Methanol was added to solvent to make a 1 ml mixture, Mixture was then mixed by hand for 1 minute.
11:05 - Sample 2 mixute was weighed on was scale.
11:10 - .92 mg Cinnamic Acid was measured out and added to empty volumetric flash.[Did you wash the volumetric with methanol before sample 3? JCB]
11:15 - Methanol was added to solvent to make a 1 ml mixture. Mixture was then mixed by hand for 2 minutes.
11:17 - Sample 3 mixture was weighed on scale.