Organic Chemistry Answers

POLYER LAB  Chemistry 30

1. Use a graduated cylinder (or teaspoon)* to add 10 mL of tap water to a Dixie Cup. With a pen, mark the level of the water on the outside of the cup. Add an additional 10 mL of water to the cup and mark the water level. Repeat 2 times until a total of 40 mL has been added to the cup. Now dump out all the water. 2. Measure 10 mL of tap water into the Dixie cup and add 3-4 drops of food coloring. 3. Using the markings on the Dixie cup, add ~10 mL of Elmer’s white glue directly to the cup and mix (stir rod

or spoon) gently until the mixture has a uniform consistency. 4. Use a graduated cylinder (or 1⁄2 cup measuring cup) to measure 125mL of tap water in a beaker (larger plastic

container). an electronic balance, weigh boat (or wax paper) and a scoopula (or teaspoon), add 8.7 grams of Borax to the water. This is your saturated (6.5%) sodium tetraborate solution. solid is dissolved.

1.     The food we eat is degraded, or broken down, in our bodies to provide energy for growth and function. A general overall equation for this very complex process represents the degradation of glucose (C₆H₁₂O₆) to carbon dioxide (CO₂) and water (H₂O):

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O

If 968 g of C₆H₁₂O₆ is consumed by a person over a certain period, what is the mass of CO₂ produced?                                                                                         

2.     Urea [(NH₂)₂CO] is prepared by reacting ammonia with carbon dioxide:

2NH₃(g) + CO₂(g) → (NH₂)₂CO(aq)+ H₂O(l)

In one process, 849.2 g of NH₃ are treated with 1223 g of CO₂.                       

(a) Which of the two reactants is the limiting reagent?

(b) Calculate the mass of (NH₂)₂CO formed.

 (c) How much excess reagent (in grams) is left at the end of the reaction?

A sample of lime CaO weighing 69g prepared by heating 131 g of limestone CaCO3 Calculate the yield of reaction

What are hybridisation states of each carbon atom in the following compounds? CH₂=C=O, CH₃CH=CH₂, (CH₃)₂CO, CH₂=CHCN, C₆H₆.

The determination of copper in a seawater sample gave a mean value of 77.81 mg/L and a standard deviation ss of 1.74 mg/L. (Note: the insignificant figures were retained here because these results are used below in another calculation.) How many samples must be analyzed to obtain a relative standard deviation of 1.7% in the results at the 95% confidence level? (Show your solution)

Draw the graph of dependence of velocity of reaction on the concentration of

substrate (under constant concentration of enzyme). Mark maximum velocity.

assign the NMR spectra of the compound diphenyl tertiary alcohol. including chemical shift , integral ,multiplicity, J (Hz), assignment and interpretation

Iodo acids are not normally prepared by direct iodination of carboxylic acids under conditions of the Hell–Volhard–Zelinsky reaction. Show how you could convert octadecanoic acid to its 2-iodo derivative by an efficient sequence of reactions.

give the structures of the major products you would obtain from reaction of phenol with the Br2(3mol) reagents?

draw 3,3-diflouro-2-hexanone