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ORG CHEM LAB > EX1: QUALITATIVE ANALYSIS OF ELEMENTS IN ORGANIC COMPOUNDS > Flashcards

EX1: QUALITATIVE ANALYSIS OF ELEMENTS IN ORGANIC COMPOUNDS Flashcards

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1
Q

SYSTEMIC APPROACH that can give a satisfactory result in IDENTIFYING ELEMENTS IN INORGANIC COMPOUND using qualitative chemical reagents

A

QUALITATIVE ANALYSIS

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2
Q

qualitative chemical tests HIGHLY RELY on _______ through observation of test results

A

ORGANOLEPTIC APPROACH

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3
Q

the use of SENSORY ORGANS in identifying

A

ORGANOLEPTIC APPROACH

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4
Q

detected by STRONGLY HEATING the said substance with CUPRC OXIDE (CuO)

A

CARBON & HYDROGEN

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5
Q

it is important in making Co2 & H2O

A

GLUCOSE

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6
Q

upon heating, the CARBON AND HYDROGEN present in the organic compound are OXIDIZED to ______ and _____, respectively

A

CARBON DIOXIDE AND WATER

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7
Q

upon heating, the CARBON AND HYDROGEN present in the organic compound are _____ to carbon dioxide and water, respectively

A

OXIDIZED

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8
Q

upon heating, the ____ and _____ present in the organic compound are oxidized to carbon dioxide and water, respectively

A

CARBON AND HYDROGEN

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9
Q

LIME WATER

A

CALCIUM HYDROXIDE (CaOH)

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10
Q

_____ is detected by lime water

A

CO2 / CARBON DIOXIDE

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11
Q

CO2 is detected by _____

A

LIME WATER / CALCIUM HYDROXIDE (CaOH)

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12
Q

____ is detected by anhydrous cupric sulfate

A

H2O / WATER

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13
Q

H2O is detected by

A

ANHYDROUS CUPRIC SULFATE

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14
Q

_____ reacts with Ca(OH)2 (calcium hydroxide / lime water) forming CaCO3 (Calcium carbonate) and H2O (water)

A

CO2

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15
Q

CO2 reacts with ______ forming CaCO3 and H2O

A

Ca(OH)2
Calcium hydroxide
Lime water

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16
Q

CO2 (carbon dioxide) reacts with Ca(OH)2 (calcium hydroxide) forming ____ and _____

A

CaCO3 - calcium carbonate
H2O - water

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17
Q

CO2 + Ca(OH)2 → CaCO3 + H2O

A

CLEAR SOLUTION BECOMES TURBID

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18
Q

CLEAR SOLN BECOMES TURBID

A

CO2 + Ca(OH)2 → CaCO3 + H2O

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19
Q

in the chemical reaction: CO2 + Ca(OH)2 → CaCO3 + H2O, which FORMED PRECIPITATES

A

CaCO3
calcium carbonate

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20
Q

___ reacts with anhydrous CuSO4 forming CuSO4 * 5 H2O

A

H2O

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21
Q

H2O reacts with _________ forming CuSO4 * 5 H2O

A

ANHYDROUS CuSO4 (cupric sulfate)

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22
Q

H2O reacts with anhydrous CuSO4 forming ______ * _____

A

CuSO4 * 5 H2O
cupric sulfate pentahydrate

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23
Q

white powder turns to BLUE

A

5 H2O + CuSO4 → CuSO4 * 5 H2O

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24
Q

5 H2O + CuSO4 → CuSO4 * 5 H2O

A

WHITE POWEDER TURNS BLUE

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25
Q

DIFFICULT TO DETECT

A

nitrogen
halogens
sulfur

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26
Q

how to convert nitrogen, halogens, and sulfur into inorganic ions

A

fuse the organic compound with SODIUM METAL

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27
Q

the alkaline solution obtained by EXTRACTING THE FUSED MASS in water is called

A

SODIUM EXTRACT / LASSAIGNE’S EXTRACT

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28
Q

LASSAIGNE’S EXTRACT / sodium extract is used to detect

A

NITROGEN, HALOGENS, SULFUR

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29
Q

if the organic compound is in the form of AMINO NITROGEN (–NH2), heating it with ________ will liberate ammonia (NH3) gas

A

SODA LIME (NaOH & CaO)

30
Q

if the organic compound is in the form of ________, heating it with SODA LIME (NaOH and CaO) will liberate ammonia (NH3) gas

A

AMINO NITROGEN (-NH2)

31
Q

if the organic compound is in the form of AMINO NITROGEN (–NH2), heating it with SODA LIME (NaOH and CaO) will liberate ________

A

AMMONIA GAS (NH3)

32
Q

characteristic pungent ammonia odor

A

SODA LIME TEST

33
Q

to confirm the presence of the ammonia gas, a moist RED LITMUS PAPER must turn to ___

A

BLUE

34
Q

LIMITED for organic compounds with AMINO (–NH2) group only

A

SODA LIME TEST

35
Q

CANNOT BE DETECTED by this SODA LIME TEST

A

nitro (-NO2) and azo (-N=N-) compounds

36
Q

usually found in URINE

A

UREA

37
Q

SODA LIME TEST REACTION

A

urea + NaOH (sodium hydroxide) + CaO (calcium oxide) → 2 NH3 (ammonia) + Na2CO3 (sodium carbonate)

38
Q

urea + NaOH + CaO → 2 NH3 + Na2CO3

A

SODA LIME TEST

39
Q

TEST FOR NITROGEN

A

SODA LIME TEST

40
Q

TEST FOR HALOGENS

A

BEILSTEIN TEST
SILVER NITRATE TEST

41
Q

an ORGANIC HALOGEN compound DIPPED IN A COPPER WIRE will yield a _________ burned

A

GREEN-COLORED FLAME

42
Q

responsible the color of the flame in beilstein test

A

CUPRIC HALIDE

43
Q
  • the COPPER OXIDE from the copper wire formed upon heating, REACTS WITH THE HALOGEN from the organic compound to form
A

CUPRIC HALIDE

44
Q

does not yield a positive result in beilstein test

A

FLUORINE

45
Q

cupric fluoride is

A

NOT VOLATILE

46
Q

the HALOGEN reacts with SILVER NITRATE in the presence of dilute nitric acid forming insoluble silver halide

A

SILVER NITRATE TEST

47
Q

the halogen reacts with silver nitrate in the presence of dilute nitric acid forming _______

A

INSOLUBLE SILVER HALIDE

48
Q

the silver halide yields a ________ precipitate, confirming the presence of a halogen

A

WHITE TO YELLOW

49
Q

LUNAR CAUSTIC

A

AgNO3
silver nitrate

50
Q

used for treatment ng GONORRHEA sa newborn

A

SILVER NITRATE

51
Q

TEST FOR SULFUR

A

LEAD ACETATE TEST

52
Q
  • the presence of sulfur is identified by the production of ________ precipitate through lead acetate test
A

BROWNISH-BLACK

53
Q

the organic compound containing sulfur will yield _________ upon reaction with lead acetate

A

LEAD SULFIDE
PbS

54
Q

the organic compound containing sulfur will yield lead sulfide upon reaction with ________

A

LEAD ACETATE

55
Q

protein found in the human body

A

ALBUMIN

56
Q

an amino acid with SULFHYDRYL GROUP

A

CYSTEINE

57
Q

albumin contains the amino acid

A

CYSTEINE

58
Q

_____ is usually black

A

SULFUR

59
Q

in ______, cysteine will react to lead ions (Pb2+) forming black precipitate, PbS

A

STRONGLY BASIC SOLN

60
Q

_____ the solution causes the breaking of the polypeptide chain

A

HEATING

61
Q

TEST FOR OXYGEN

A

FERROX TEST

62
Q

oxygen can be detected using

A

FERROX PAPER / iron III hexathiocyanatoferrate

63
Q

red to reddish-purple color

A

ferrox test

64
Q

FERROX PAPER is prepared by soaking a filter paper in _____ with equal parts of ferric chloride and ammonium thiocyanate

A

METHANOL

65
Q

the complex FeSCN2+ yields a __________ as it is distributed through the filter paper and the organic compound containing oxygen

A

DEEP RED COLORED SOLN

66
Q

clear solution turns turbid

A

REACTION W/ LIME WATER

67
Q

white powder turns blue

A

reaction w/ anhydrous cupric sulfate

68
Q

characteristic pungent odor, red litmus turns blue

A

soda lime test

69
Q

green-colored flame

A

beilstein test

70
Q

formation of white precipitate

A

silver nitrate

71
Q

formation of black precipitate

A

lead acetate test

72
Q

turns to red to reddish-purple solution

A

ferrox test

ORG CHEM LAB (20 decks)

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