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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

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
DIFFICULT TO DETECT
nitrogen halogens sulfur
26
how to convert nitrogen, halogens, and sulfur into inorganic ions
fuse the organic compound with SODIUM METAL
27
the alkaline solution obtained by EXTRACTING THE FUSED MASS in water is called
SODIUM EXTRACT / LASSAIGNE'S EXTRACT
28
LASSAIGNE'S EXTRACT / sodium extract is used to detect
NITROGEN, HALOGENS, SULFUR
29
if the organic compound is in the form of AMINO NITROGEN (–NH2), heating it with ________ will liberate ammonia (NH3) gas
SODA LIME (NaOH & CaO)
30
if the organic compound is in the form of ________, heating it with SODA LIME (NaOH and CaO) will liberate ammonia (NH3) gas
AMINO NITROGEN (-NH2)
31
if the organic compound is in the form of AMINO NITROGEN (–NH2), heating it with SODA LIME (NaOH and CaO) will liberate ________
AMMONIA GAS (NH3)
32
characteristic pungent ammonia odor
SODA LIME TEST
33
to confirm the presence of the ammonia gas, a moist RED LITMUS PAPER must turn to ___
BLUE
34
LIMITED for organic compounds with AMINO (–NH2) group only
SODA LIME TEST
35
CANNOT BE DETECTED by this SODA LIME TEST
nitro (-NO2) and azo (-N=N-) compounds
36
usually found in URINE
UREA
37
SODA LIME TEST REACTION
urea + NaOH (sodium hydroxide) + CaO (calcium oxide) → 2 NH3 (ammonia) + Na2CO3 (sodium carbonate)
38
urea + NaOH + CaO → 2 NH3 + Na2CO3
SODA LIME TEST
39
TEST FOR NITROGEN
SODA LIME TEST
40
TEST FOR HALOGENS
BEILSTEIN TEST SILVER NITRATE TEST
41
an ORGANIC HALOGEN compound DIPPED IN A COPPER WIRE will yield a _________ burned
GREEN-COLORED FLAME
42
responsible the color of the flame in beilstein test
CUPRIC HALIDE
43
* the COPPER OXIDE from the copper wire formed upon heating, REACTS WITH THE HALOGEN from the organic compound to form
CUPRIC HALIDE
44
does not yield a positive result in beilstein test
FLUORINE
45
cupric fluoride is
NOT VOLATILE
46
the HALOGEN reacts with SILVER NITRATE in the presence of dilute nitric acid forming insoluble silver halide
SILVER NITRATE TEST
47
the halogen reacts with silver nitrate in the presence of dilute nitric acid forming _______
INSOLUBLE SILVER HALIDE
48
the silver halide yields a ________ precipitate, confirming the presence of a halogen
WHITE TO YELLOW
49
LUNAR CAUSTIC
AgNO3 silver nitrate
50
used for treatment ng GONORRHEA sa newborn
SILVER NITRATE
51
TEST FOR SULFUR
LEAD ACETATE TEST
52
* the presence of sulfur is identified by the production of ________ precipitate through lead acetate test
BROWNISH-BLACK
53
the organic compound containing sulfur will yield _________ upon reaction with lead acetate
LEAD SULFIDE PbS
54
the organic compound containing sulfur will yield lead sulfide upon reaction with ________
LEAD ACETATE
55
protein found in the human body
ALBUMIN
56
an amino acid with SULFHYDRYL GROUP
CYSTEINE
57
albumin contains the amino acid
CYSTEINE
58
_____ is usually black
SULFUR
59
in ______, cysteine will react to lead ions (Pb2+) forming black precipitate, PbS
STRONGLY BASIC SOLN
60
_____ the solution causes the breaking of the polypeptide chain
HEATING
61
TEST FOR OXYGEN
FERROX TEST
62
oxygen can be detected using
FERROX PAPER / iron III hexathiocyanatoferrate
63
red to reddish-purple color
ferrox test
64
FERROX PAPER is prepared by soaking a filter paper in _____ with equal parts of ferric chloride and ammonium thiocyanate
METHANOL
65
the complex FeSCN2+ yields a __________ as it is distributed through the filter paper and the organic compound containing oxygen
DEEP RED COLORED SOLN
66
clear solution turns turbid
REACTION W/ LIME WATER
67
white powder turns blue
reaction w/ anhydrous cupric sulfate
68
characteristic pungent odor, red litmus turns blue
soda lime test
69
green-colored flame
beilstein test
70
formation of white precipitate
silver nitrate
71
formation of black precipitate
lead acetate test
72
turns to red to reddish-purple solution
ferrox test

ORG CHEM LAB (20 decks)

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