Part 1 significant fiusbe written in pen or pencil. You must show your work. You
ID: 578905 • Letter: P
Question
Part 1 significant fiusbe written in pen or pencil. You must show your work. You must think about significant figures. Y ou must write neatly- I will penalize you for sloppiness; this is a Jormal report. 1. Numbers from the experiment Realize that I have changed the amounts, quivalents, etc. from what was actually used in the experiment (a) If you were supposed to add 0.0165 moles of 4-tert-butyleyclohexanone to the reaction flask, how many grams were you supposed to use? -grams (b) If you were supposed to add 0.85 equivalents of sodium borohydride (compared to 4-tert- butylcyclohexanone), how many moles of sodium borohydride were you supposed to add? This number should be based off of the amount of 4-tert-butylcyclohexanone given in (a). moles (c) How many grams of sodium borohydride were you supposed to add (based off the number in part b)? -grams (d) If you were supposed to add 2.5 equivalents of 3.0 M NaOH (compared to 4-tert- butylcyclohexanone). How many milliliters of 3.0 M NaOH would you add? mL (e) If you isolated 1.012 grams of 4-tert-butylcyclohexanol, what was your percent yield based on the numbers in parts (a) -(d)? (Page 1)Explanation / Answer
a) 4-tert butylcyclohexanone: Molecular Wt=154.253 g/mol
1 mol 4-tert butylcyclohexanone = 154.253g
.0165 mol = 2.55g
b) 0.85 eq of NaBH4 compared to 4-tert butylcyclohexanone = 0.85x0.0165 mol = 0.14 mol
c) g of NaBH4 supposed to be added = MW x no of moles = 37.83 x .14 = 5.30g