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Organic Chemistry LAB > Experiment #8: Carboxylic Acids And Derivatives > Flashcards

Experiment #8: Carboxylic Acids And Derivatives Flashcards

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1
Q

TRUE OR FALSE:

Carboxylic Acids is soluble in organic solvent regardless of size

A

TRUE

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2
Q

TRUE OR FALSE:

Carboxylic Acid is soluble in water if it contains 7 or less than carbon atoms and has O atoms to hydrogen bond.

A

FALSE; it is soluble in water if it contains 5 or less than carbon atoms and has O atoms to hydrogen bond

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3
Q

It is a positive identification test for acids

A

Solubility in 6m NaOH

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4
Q

TRUE OR FALSE:

Carboxylic Acids is soluble if its ph level is less than 10

A

TRUE

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4
Q

TRUE OR FALSE:

A carboxylic acid that is insoluble in pure water will be soluble in base due to the formation of the sodium salt of the acid as the acid is neutralize by the base (HIGH MW)

A

TRUE

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5
Q

TRUE OR FALSE:

Carboxylic Acid is the strongest organic compound because of its resonance stability

A

TRUE

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6
Q

TRUE OR FALSE:

You can confirm if a compound is an acid if it reacts with a strong base

A

TRUE

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7
Q

The reaction of an alcohol with a carboxylic acid

A

Esterification

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8
Q

A cyclic ester is called a _____________

A

Lactone

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9
Q

What is the by product of Esterification?

A

H2O

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10
Q

What compounds we will need when performing Fischer’s Esterfication?

A

H+ and HCl

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10
Q

This is a test where alcohols react with carboxylic to form fruity smelling compounds called esters

A

Ester Test

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10
Q

In ester test, we used acids as catalyst such as _______?

A

H2SO4

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11
Q

TRUE OR FALSE:

By using a weak acid, an alcohol can react with a carboxylic acid (fischer esterification) to give an ester

A

FALSE; by using a strong acid

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12
Q

it involves loss of water (reverse of hydrolysis)

A

Dehydration

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13
Q

What is the chemical reaction of dehydration?

A

Condensation Reaction

14
Q

It is the reaction with water where decomposition occurs more complex to decompose to simpler molecules

A

Hydrolysis

15
Q

TRUE OR FALSE:

All acids derivatives yield carboxylic acids on hydrolysis

A

TRUE

16
Q

TRUE OR FALSE:

Ester does not need acid/base catalyst (vigorous)

A

FALSE; it needs acid/base catalyst

17
Q

TRUE OR FALSE:

Amide needs base catalyst and heating

A

TRUE

18
Q

What is the positive result of Acid Hydrolysis?

A

Evolution of heat after addition of H2O, bubble (CO2) formation after addition of sodium bicarbonate (brisk effervesence)

19
Q

Why do we put sodium bicarbonate when testing acid hydrolysis?

A

Because they react with carboxylic acids

20
Q

IDENTIFICATION:

Alcohols react with ____ to form esters and carboxylic acids

A

Acetyl Anhydrides

21
Q

TRUE OR FALSE:

In Hydrolysis of Acetyl Anhydride, the reaction is slower because acid anhydride aren’t so violently reactive as acyl chlorides.

A

TRUE

22
Q

IDENTIFICATION:

These compounds are so reactive that they will react with water under neutral conditions.

A

Acid Halides and Anhydrides

23
Q

What are the annoying side reaction of acid halides and anhydrides?

A

Air (moisture) sensitive

24
Q

IDENTIFICATION:

In the Hydrolysis of Acid Halides and Anhydrides, hydrolysis can be avoided by using ___________ and ___________?

A

Dry Nitrogen Atmosphere & Anhydrous Solvents

25
Q

What is the basic hydrolysis of esters called?

A

Saponification

26
Q

What is the reverse reaction of the Fischer Esterification?

A

Acid Catalyzed Hydrolysis

27
Q

TRUE OR FALSE:

In Hydrolysis of Esters, addition of excess water drives the equilibrium towards the side of the acid and alcohol

A

TRUE

28
Q

They are the most reluctant derivatives to undergo hydrolysis, but they can be forced to by the use of vigorous conditions such as heating with 6M HCl or 40% NaOH for prolonged periods of time.

A

Amides

28
Q

TRUE OR FALSE:

The carboxylic acid derivatives vary greatly in their reactivity with nucleophiles.

A

TRUE

28
Q

What is the positive result for Base Hydrolysis?

A

Appearance of a blue color on the filter paper with ammonia or amine-like odor. After acidification, some compounds form precipitates or heterogeneous mixtures. Observation of characteristic odor of carboxylic acids.

29
Q

TRUE OR FALSE:

In general, it is easy to convert more reactive derivatives into less reactive derivatives.

A

TRUE

30
Q

In esterification, what is the carbonyl compound’s mechanism?

A

Nucleophilic Addition

Organic Chemistry LAB (10 decks)

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