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2nd chemistry > 2sem Prelims Chm Lab > Flashcards

2sem Prelims Chm Lab Flashcards

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1
Q

The _______ and the _________ properties of many organic compounds can be used to differentiate them from inorganic compounds.

A

physical and chemical

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2
Q

properties are being shared by both _____________ compounds, there are several that are distinctly different. These can be used to tell whether a compound is __________

A

organic and inorganic

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3
Q

What are the materials use to DIFFERENCES BETWEEN ORGANIC AND INORGANIC COMPOUNDS?

A

sodium chloride
sugar
chloroform
alcohol
benzene
potassium chloride

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4
Q

What are the apparatus use to DIFFERENCES BETWEEN ORGANIC AND INORGANIC COMPOUNDS?

A

evaporating dish
alcohol lamp
burner
conductivity apparatus
test tubes
beaker

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5
Q

Differences Observed Upon Heating place a pinch of ___________ in an evaporating dish.

A

sodium chloride

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6
Q

What to do gently at first and then with a full force of the burner. And then?

A

Heat & observe

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7
Q

Repeat the procedure using a pinch of ________ instead of sodium chloride.

A

Sugar

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8
Q

Differences in Solubility
1. Test the solubility of the following substances in water:

A

NaCI
Chloroform
sugar
benzene
potassium chloride.

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9
Q

What is the difference of ORGANIC to inorganic compound?

A

•low melting point
•low boiling point
•Flammable
•Non- conductor of electridity

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10
Q

What is the difference of INORGANIC to organic compound?

A

•High metting point
•High Boiling point
•Non - Flammable
•Good conductor of electricity

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11
Q

organic compounds are no capable of ___________ because they do not form ions.

A

Conducting electricity

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12
Q

Who are the inorganic compounds and produced light?

A

Sodium chloride & Potassium Chloride

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13
Q

Who are the organic compound & didn’t produce light?

A

Chloroform
Alcohol
Sugar

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14
Q

What are the soluble to water ?

A

Sodium Chloride
Sugar
Potassium Chloride

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15
Q

What are soluble to alcohol?

A

Chloroform
Benzene

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16
Q

Sugar turns to liquid, caramelization also called?

A

Decomposition

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17
Q

What do you call if the heat is hard to penetrate?

A

Intermolecular Bonding

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18
Q

organic reactions yield compounds other than desired products due to?

A

side reactions

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19
Q

What is on standing for sometimes or when exposed to light and heat undergo partial decomposition?

A

Pure organic compounds

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20
Q

the process of theses becomes an essential laboratory technique in the preparation of pure organic compounds.

A

separation and purification

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21
Q

Organic compounds maybe separated and purified by the following methods:

A

solution and filtration
extraction
crystallization
sublimation

22
Q

In separating solid from liquid, the most common method used is?

A

filtration

23
Q

In filtration the method employed depends on the physical nature of the mixture such as:

A

volume
viscosity
particle size
amount of solid present
volatility of the liquid

24
Q

Material used in filtration experiment?

A

distilled water
benzoic acid
sugar
denatured alcohol
filter paper

25
Q

Apparatus use in filtration experiment?

A

test tube
funnel

26
Q

Prepare a mixture of equal amount of ________ each a size of a corn grain, and mix them thoroughly.

A

benzoic acid and sugar,

27
Q

Divide into 2 equal portions:
To one portion, add ________ shake vigorously and
filter.

A

5 ml of distilled water

28
Q

Boil the solution and filter.
Collect equal amount of filtrate in two separate _________
Cover one ________ with a watch glass and set aside to cool slowly.
Place the other _________ in an ice bath and stir rapidly while cooling.
When crystallization is complete in both beakers, compare the type of crystals formed.

A

beaker

29
Q

What type of filtration Results is these in filtration experiment:

Less crystals
Forms slowly
Well defined

A

Set aside

30
Q

What type of filtration Results is these in filtration experiment:

More crystals
Crystals form quickly/ fast
Fine crystals

A

ice bath

31
Q

How will you induce crystal formation?

A

Stiring

32
Q

Will not totally dissolve in water and soluble high temperature of water

A

Benzoic acid plus water

33
Q

Not ordinary temp

A

Benzoic acid plus sugar

34
Q

In sugar, ethyl alcohol and benzene acid what is the only one that will dissolve

A

benzene acid

35
Q

Benzoic acid dissolve in

A

Hot water

36
Q

Two minisible

A

Seperatory funne

37
Q

This is not soluble in water cause water is organic & solvent

A

Oil

38
Q

is a process of removing from a mixture usually an aqueous solution, one or more substances by shaking with a liquid in which the substances to be removed are soluble, the liquid being immiscible to the aqueous solution.

A

Extraction

39
Q

A good solvent for extraction should show a _____________ in water in which the sought organic compound is dissolved.

A

little or no solubility

40
Q

Some solvents used are: and these do not react with the materials being extracted.

A

ether
carbon tetrachloride
chloroform.

41
Q

This must be inert to most compounds, which can be removed by simple distillation.

A

solvents

42
Q

The ________ is shaken with the selected solvent in a separatory funnel.

A

solution

43
Q

Materials use in extraction

A

benzoic acid
sodium chloride
distilled water
chloroform

44
Q

What are the Apparatus used in extraction

A

beaker
alcohol lamp / burner
separator funnel
evaporating dish

45
Q

is a property exhibited by some solid organic and inorganic compounds, in which they are capable of being transformed directly in the vapor state without passing the liguid state.

A

Sublimation

46
Q

What are the Materials used in sublimation:

A

naphthalene
sodium sulfate
filter paper
rubber band or string
pin
barium chloride

47
Q

What are the apparatus use in sublimation

A

evaporating dish
funnel
alcohol lamp
test tubes

48
Q

We cannot filter everything without the

A

Solvent

49
Q

Color impurities removed bc of the adsorbent or

A

Animal charcoal

50
Q

Removal of colored impurities

A

Discolorization

51
Q

You were not able to remove the color impurities

A

Colorless

2nd chemistry (5 decks)

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