Organic Chem 1 Lab Practical

Front 1

Acetanilide lab-

Which chemicals should one be especially careful with

Back 1

aniline
acetic anhydride
hydrochloric acid

Front 2

crude acetanilide should have a ______ melting point and a ________ percent yield then the purified acetanilide.

Back 2

lower melting point
higher percent yield

Front 3

Which of the following equipment is needed for a vacuum filtration

Back 3

filter flask
filter adapters
Buchner or Hirsch funnel filter paper
thick walled tubing

Front 4

If you started with .05moles of aniline and made 6.75g of acetanilide, what is your percent yield?
MW of Acetanilide = 135 g/mole

Back 4

100%

Front 5

In today’s laboratory you will be separating an acid and a base. One can calculate

Back 5

weight percent recovery

Front 6

a) In this experiment Mixture A contains both benzoic acid and p-nitroaniline. The base is ________________.

Back 6

p-nitroaniline

Front 7

When extracting the methylene chloride (dichloromethane) solution with 25ml of 6M HCl, the procedure says to drain the aqueous extract into an Erlenmeyer. The aqueous layer is

Back 7

hydrochloric acid

Front 8

When extracting the methylene chloride (dichloromethane) solution with 25ml of 6M HCl, the procedure says to drain the aqueous extract into an Erlenmeyer. Which layer will be on the top?

Back 8

the aqueous layer

Front 9

Theorectically, which type of distillation should give better separation of the two compounds

Back 9

fractional distillation

Front 10

Which two unknowns will be separated by distillation today

Back 10

ketone and alkane

Front 11

In the IR of an alkane, there should be no presence of

Back 11

A carbonyl absorption around 1710cm-1

Front 12

In order to identify the unknown compounds in the distillation lab, in addition to IR, we will use

Back 12

boiling point

Front 13

The Rf value of a compound is defined as

Back 13

The distance traveled by the substance/the distance traveled by the solvent front.

Front 14

In the first part of the chromatography experiment we will be separating the following compounds

Back 14

fluorene
fluorenol
fluorenone

Front 15

When one monitors a reaction by thin-layer chromatography one knows that the reaction is complete when TLC shows

Back 15

the appearance of a spot for product and the disappearance of a spot for
starting material

Front 16

Thin Layer Chromatography can be used to

Back 16

- follow the extent of reaction
- suggest the purity of a compound

Front 17

What is the primary difference between TLC and column chromatography

Back 17

The moving phase in column chromatography travels downward, whereas in TLC the solvent ascends the plate

Front 18

Which two compounds in today’s experiment will be separated from column chromotograhy?

Back 18

Fluorene and Fluorenone

Front 19

The adsorbent on the column in the chromotography experiment will be

Back 19

Alumina

Front 20

Fluorene will elute off the column with a

Back 20

non polar solvent

Front 21

Another name for t-Pentyl Chloride is

Back 21

2-chloro-2-methylbutane

Front 22

If one starts with .05 moles of t-pentyl alcohol, what is the theoretical yield of t-pentyl chloride. (Note: the molecular weight of t-pentyl chloride is 106 grams/mole)

Back 22

5.3g

Front 23

What absorption will not be present in the IR spectrum of t-pentyl chloride that would be present in the starting material t-pentyl alcohol?

Back 23

alcohol

Front 24

The synthesis of t-pentyl chloride from t-pentyl alcohol is an

Back 24

SN1 reaction

Front 25

The Infrared Spectrum of S-(+)-Carvone and R-(-)-Carvone is?

Back 25

exactly the same

Front 26

R-(-)-Carvone and S-(+)-Carvone are

Back 26

- non-superimposable mirror images
- enantiomers

Front 27

Speific Rotation is defined by the equation

Back 27

alpha observed/(c)(l)

Front 28

Which method will differentiate between the two enantiomeric carvones

Back 28

polarimetry