Alcohol and Phenols

Question 1

Oxygen containing compounds such as __________, ____________, and __________ are known as organic derivatives of water.

Answer 1

1. Alcohols
2. Phenols
3. Ethers

Question 2

What is the general structure of Water?

Answer 2

H2O

Question 3

What is the general structure of Alcohol?

Answer 3

R-O-H

Question 3

What is the general structure of phenol?

Answer 3

Ar-O-H

Question 4

What is the general structure of Ether?

Answer 4

R-OR’

Question 5

It contain a hydroxy group (OH) bonded to an sp3 hybridized carbon.

Answer 5

Alcohols

Question 6

In phenols, the hydroxyl group is directly bonded to an __________?

Answer 6

Aromatic System

Question 7

It is a solution of anhydrous zinc chloride in concentrated hydrochloric acid.

Answer 7

Lucas Reagent

Question 8

LUCAS TEST FOR ALCOHOLS (Rate of Reaction):

____________ immediately give a positive result.

Answer 8

Tertiary Alcohols

Question 9

LUCAS TEST FOR ALCOHOLS (Rate of Reaction):

____________ react slower than tertiary alcohols

Answer 9

Secondary Alcohols

Question 10

What are the limitations of Lucas Test for Alcohols?

Answer 10

The test applies only to those alcohols soluble in the reagent.

Question 10

LUCAS TEST FOR ALCOHOLS (Rate of Reaction):

____________ produce no identifiable cloudiness.

Answer 10

Primary Alcohols

Question 10

Test to identify phenols and alcohols.

Answer 10

Acetyl Chloride Test for Alcohols

Question 11

TRUE OR FALSE:

Acetyl chloride is very corrosive and its vapors are irritating and toxic. It reacts violently with water and some alcohols.

Answer 11

TRUE

Question 12

Test to identify phenols

Answer 12

Iron (III) Chloride Test

Question 13

How to determine if the sample is positive using Bromine in Water Test for Phenols?

Answer 13

Disappearance of the orange color

Question 14

TRUE OR FALSE

If water is present in the unknown, the test will probably give a false positive test as acetyl chloride reacts vigorously with water.

Answer 14

TRUE

Question 14

How to determine if the sample is positive using Acetyl Chloride Test for Alcohols?

Answer 14

Evolution of Heat and Hydrogen Chloride Gas

Question 15

How to determine if the sample is positive using Iron (III) Chloride Test?

Answer 15

The presence of bright
color, even briefly, indicates a
phenol.

Question 16

TRUE OR FALSE:

Phenol is toxic and will cause burns to skin. Any contact should be thoroughly washed with large quantities of water. Wear safety glasses at all times in the laboratory

Answer 16

TRUE

Question 17

What are the 4 samples that will be used in the procedure?

Answer 17

• Butanol
• Sec-Butyl
• Tert-Butyl
• Phenol

Question 18

PROCEDURE:

What are the measurement that we will be needed for Lucas Test for Alcohols?

Answer 18

• 1mL Lucas Reagent
• 2 drops per sample

Question 19

PROCEDURE:

What are the measurement that we will be needed for Acetyl Chloride Test for Alcohols?

Answer 19

• 5 drops per sample
• 5-10 drops of Acetyl Chloride

Question 20

PROCEDURE:

What are the measurement that we will be needed for Iron (III) Chloride Test for Phenols?

Answer 20

• 5 drops of 10% FeCl3 Solution
• 3 drops of sample

Question 21

**PROCEDURE:** What are the measurement that we will be needed for **Bromine in Water Test for Phenols?**

Answer 21

* 1 mL 95% of EtOH * 5 drops of Phenol * 1 drop H2O * After shaking, 1 drop of Br2/H2O

Question 22

**TRUE OR FALSE:** Alcohols, phenols and ethers are known as **organic derivatives of water** because they may be seen to arise from the replacement of one or both of the hydrogen atoms of water by an organic group.

Answer 22

TRUE

Question 23

**TRUE OR FALSE:** Under the proper conditions, the O-H bond can be made to **split heterolytically** to release a proton

Answer 23

TRUE

Question 24

What is the pKA of Hydronium Ion?

Answer 24

-1.7

Question 25

What is the pKA of Ethyloxonium Ion?

Answer 25

-2.4

Question 26

What are the names of Substituted Phenols?

Answer 26

* o-cresol * p-cresol * m-cresol * Catechol * Resorcinol

Question 27

# [](http://) **TRUE OR FALSE:** Lucas Test for alcohols is test for alcohols with **six or fewer carbons.**

Answer 27

TRUE

Question 28

How to determine if the sample is **positive** using **Lucas Test for Alcohols?**

Answer 28

formation of an insoluble layer, cloudiness, color change (red or orange) or an emulsion.

Question 29

**TRUE OR FALSE:** Some aldehydes or ketones also give colored complexes with FeCl3.

Answer 29

TRUE

Question 30

**TRUE OR FALSE:** Iron (III) Chloride (FeCl3) is toxic and corrosive. Ethanol is flammable and toxic. **Do not keep them away** from flames or other heat sources.

Answer 30

False; keep them away

Question 31

After dropping the measurements on the test tubes, what are the four steps that you need to do?

Answer 31

1. Shake 2. Let stand 3. Observe 4. Dispose the wastes in properly labeled containers

Question 32

In what tests do you need to note and record any formation of a brightly colored mixture?

Answer 32

1. Iron (III) Chloride Test for Phenols 2. Bromine in Water Test for Phenols

Question 33

What are the four test in sampling alcohols and phenols?

Answer 33

1. Lucas Test for Alcohols 2. Acetyl Chloride Test for Alcohols 3. Iron (III) Chloride Test for Phenols 4. Bromine in Water Test for Phenols

Question 34

**TRUE OR FALSE:** Large Non-Polar Aromatic Ring makes it slightly soluble or insoluble in water

Answer 34

TRUE

Question 35

**TRUE OR FALSE:** Bromine (Br2) is toxic and oxidizing. It causes mild burns.

Answer 35

False; it cause severe burns