Coordination Chemistry 1 Overview Getting Started Techniques Procedure FAQ Full Lab Manual Introduction & Goals Chemistry & Background Key Questions Prelab Problems Safety Procedure In Your Write-up Experiments Index ChemLab Home		FAQ Index Question 1 This experiment seems different from many of our others and I'm not sure what should be in my write-up, besides the procedure and the yield calculations. What else should I write? Question 2 For prelab problem 1, when calculating the molar mass of CuCl2.2 H20 do we include the molar mass of H2O? Question 3 What exactly is ETHANOL? Is it the the kind of alcohol used as a gasoline substitute or the kind you drink? Submissions Submit a question or an answer to the FAQ Questions & Answers Question 1 This experiment seems different from many of our others and I'm not sure what should be in my write-up, besides the procedure and the yield calculations. What else should I write? Professor Milde During lab, include written observations of what happens in each step of the procedure. This includes things like bubbles, precipitation, dissolving, and color changes. In your discussion, include a summary of your yield results and the overall reaction stoichiometry. Then discuss the type of reactions performed in each step and the purpose of each reagent and procedure in the synthesis. Double check the lab manual for the important results that should be in your write-up. Question 2 For prelab problem 1, when calculating the molar mass of CuCl2.2 H20 do we include the molar mass of H2O? Professor Milde Yes, you do. The two water molecules are included in the crystal structure of the solid salt and should be included when the molar mass is calculated. Your addition to calculate the molar mass of the solid should include 2 x 18 = 36 g/mol, to account for the mass of the two water molecules. Question 3 What exactly is ETHANOL? Is it the the kind of alcohol used as a gasoline substitute or the kind you drink? Professor Milde Ethanol has the molecular formula CH3CH2OH. As a fermentation product of grains and fruits, it appears in the alcoholic beverages that students of legal age sometimes drink. The ethanol used in the experiment is a laboratory reagent not suitable for human consumption with safety information that includes FLAMMABLE, TOXIC, HARMFUL BY INHALATION AND IF SWALLOWED, IRRITATING TO EYES, RESPIRATORY SYSTEM AND SKIN warnings. The alcohol used as an alternative fuel is methanol, commonly called wood alcohol. It's formula is CH3OH and it has similar safety warnings. Submissions Submit to the FAQ You can submit either a question or an answer to a question about this week's experiment. Your submission will be mailed to the site editor, who will respond to you directly and also add your submission to the FAQ page. Having trouble with the submission procedure? Check your Kerberos installation. If you lose the FAQ Submission window it may be hidden behind another browser window.
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