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Chemistry 1120 > CHEM-1125 Final Exam > Flashcards

CHEM-1125 Final Exam Flashcards

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1
Q

What allows things to emulsify?

A

Polar part allows to be suspended in aqueous solution
Nonpolar part attracts hydrophobic past

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2
Q

T or F
It is always okay to pour reagents down the sink to dispose of them

A

False

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3
Q

What is the difference between saturated and unsaturated hydrocarbons?

A

Saturated= no double bonds
Unsaturated= contains double bonds

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4
Q

Primary alcohols can be oxides into what? Can that product be even more oxidized?

A

Primary alcohol—> aldehyde—> carboxylic acid

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5
Q

What can secondary alcohols be oxidized to?

A

Ketones, cannot be more oxidized

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6
Q

T or F
Aldehydes and carboxylic acids are polar but ketones are not

A

False, all polar

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7
Q

How reactive a substance is is defined as _____

A

Volatility

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8
Q

CH3CH2Ch2 + Br2 w/ heat is what type of reaction?

A

Halogenation

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9
Q

What is the purpose of chromatography?

A

Analyze reaction mixtures by separating the compounds in mixture

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10
Q

Does an enzyme change throughout a reaction?

A

No

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11
Q

What allows soap to have a dual cleaning purpose?

A

Micelles

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12
Q

What is the simplest example of a secondary alcohol?

A

Ethanol

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13
Q

What does a positive Fehlings test mean?

A

There is a reducing sugar in substance

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14
Q

An organic compound that contains only carbon and hydrogen

A

Hydrocarbon

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15
Q

T or F
Aldehyde compounds are able to be oxidized

A

True

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16
Q

How do you calculate percent yield?

A

Mass of product
_________________ x 100
Theoretical yield

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17
Q

Which of the following would be the best way to test the purity of aspirin?
A. Melting point
B. Boiling point
C. Appearance in water solution
D. How well it packs into shape

A

A

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18
Q

T or F
Saturated fatty acids are mainly liquids at room temperature

A

F

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19
Q

T or F
Hydrocarbons are soluble in water

A

False

20
Q

What functional group distinguishes alcohols from other groups?

A

Hydroxyl group

21
Q

What is the Rf equation?

A

A/B

22
Q

Which is more reactive? Unsaturated or saturated hydrocarbons?

A

Unsaturated since they have double and triple bonds

23
Q

What catalyst is required in a halogenation reaction if an alkane?

A

Br2+ heat or light

24
Q

Which disaccharide is not a reducing sugar and why?

A

Sucrose since fructose is 5 membered ring

25
Q

What are the products of saponification reaction (hydrolysis of triglycerol in basic solution)?

A

Glycerol + fatty acid salts

26
Q

Thin layer chromatography separates compounds based on _____.

A

Polarity

27
Q

T or F
Ketones cannot go under oxidation

A

False, but they are very resistant to oxidation

28
Q

How are fatty acids connected to glycerol molecule?

A

Ester bond

29
Q

What physical state would you expect to find unsaturated fats at room temperature?

A

Liquid

30
Q

What is one safety guideline for laboratory safety?

A

Wear goggles at all times when conducting experiment

31
Q

List three safety rules of the laboratory

A
  1. No eating or drinking in lab
  2. No open toed shoes, need long pants, need hair tied back
  3. Be able to easily locate all safety equipment
32
Q

What does a ketone become when it is reduced?

A

Secondary alcohol

33
Q

A carbohydrate with 3-7 carbon atoms is what type of molecule?

A

Monosaccharide

34
Q

Is propanol water soluble?

A

Yes

35
Q

Why should you keep your Ben grip cleaned often?

A

To prevent accidents at your workplace

36
Q

What is an analgesic?

A

Drug that relieves pain

37
Q

T or F
Acetone is simplest ketone

A

True

38
Q

T or F
Chromatography is a technique used to combine substances

A

False

39
Q

Amylase breaks down what?

A

Carbs

40
Q

Why don’t tertiary alcohols undergo oxidation?

A

Carbon connected to oxygen doesn’t have an H attached

41
Q

In the Rf equation A/B, what does A and B represent?

A

A= distance a spot traveled
B= top of solvent

42
Q

When developing a TLC plate, if a substance traveled less it means it’s more or less polar?

A

More polar less distance traveled

43
Q

What are the two phases of TLC?

A

Stationary phase and mobile phase

44
Q

In TLC experiment, which substance serves as the stationary phase? Is the mobile phase liquid or solid? Does it have to be pure or can it be mixed?

A

Polymers = stationary phase
Mobile phase liquid and can be both

45
Q

Mobile or stationary phase?
Enhances separation of sample mixtures

A

Mobile

46
Q

What breaks down starch?

A

Amylase

47
Q

What suffix usually indicates the compound is an enzyme?

A

-ase

Chemistry 1120 (21 decks)

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