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ORG CHEM LAB > EX2: ACIDITY AND BASICITY OF ORGANIC COMPOUNDS > Flashcards

EX2: ACIDITY AND BASICITY OF ORGANIC COMPOUNDS Flashcards

1
Q

acids and bases are defined through three main concepts:

A

✓ Arrhenius Theory
✓ Brønsted-Lowry Theory
✓ Lewis electron pair Theory

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2
Q
  • acid is any species that can increase the concentration of hydrogen ions (protons) in an aqueous solution
  • base is any species that can increase the concentration of hydroxide ions, OH–, in an aqueous solution
A

ARRHENIUS THEORY

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3
Q

AT:
* ____ is any species that can INCREASE THE CONCENTRATION OF HYDROGEN IONS (protons) in an aqueous solution

A

ACID

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4
Q

AT:
* _____ is any species that can INCREASE THE CONC. OF HYDROXIDE IONS, OH–, in an aqueous solution

A

BASE

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5
Q

AT:
* ACID is any species that can increase the concentration of _________ (protons) in an aqueous solution

A

HYDROGEN IONS H+

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6
Q

aqueous solution

A

SOLVENT = WATER

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7
Q

AT:
* BASE is any species that can increase the concentration of ____________ in an aqueous solution

A

HYDROXIDE IONS OH-

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8
Q

hindi gumagana ang arrhenius theory sa mga ____

A

acid or base in gaseous phase

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9
Q
  • an acid is any species that can donate a proton (H+)
  • a acid must have a hydrogen that can dissociate as H+
  • a base is any species that can accept a proton
  • a base must have at least one lone pair of electron to be able to form bond with a proton
A

BRONSTED-LOWRY THEORY

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10
Q

BLT:
an ______ is any species that can DONATE a proton (H+)

A

ACID

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11
Q

BLT:
* a Brønsted-Lowry ____ must have a hydrogen that can DISSOCIATE as H+

A

ACID

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12
Q

BLT:
* a _____ is any species that can ACCEPT a proton

A

BASE

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13
Q

BLT:
* a Brønsted-Lowry ____ must have at AT LEAST ONE LONE PAIR OF ELECTRON to be able to form bond with a proton

A

BASE

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14
Q

BLT:
* an ACID is any species that can _____ a proton (H+)

A

DONATE

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15
Q

BLT:
* a Brønsted-Lowry ACID must have a hydrogen that can ________ as H+

A

DISSOCIATE

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16
Q

BLT:
* a BASE is any species that can _____ a proton

A

ACCEPT

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17
Q

BLT:
* a Brønsted-Lowry base must have __________ to be able to form bond with a proton

A

AT LEAST ONE LONE PAIR OF ELECTRON

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18
Q

a CONJUFATE ACID is a species formed after the BASE ACCEPTS A PROTON, while a CONJUGATE BASE is the species formed after an ACID DONATES ITS PROTON

A

BRONSTED-LOWRY THEORY

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19
Q

BLT:
a _______ is a species formed after the BASE ACCEPTS A PROTON

A

CONJUGATE ACID

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20
Q

BLT:
a CONJUGATE ACID is a species formed after the base _____ a proton,

A

ACCEPTS

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21
Q

BLT:
a _______ is the species formed after an ACID DONATES ITS PROTON

A

CONJUGATE BASE

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22
Q

BLT:
a CONJUGATE BASE is the species formed after an acid ______ its proton

A

DONATES

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23
Q

can act as either an acid/base

A

AMPHOTERIC (i.e. water)

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24
Q

product of acid-base reaction

A

conj acid & conj base

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25
_____ react almost COMPLETELY with water
STRONGER ACIDS
26
react ONLY SLIGHTLY with water
WEAK ACIDS
27
sample of weak acid
ACETIC ACID
28
gives the EXACT STRENGTH of a given acid in water
Ka (acidity constant)
29
the NEGATIVE LOGARITH in the definition of pKa indicates an _______ between Ka and pKa
INVERSE RELATIONSHIP
30
the _______ in the definition of pKa indicates an INVERSE RELATIONSHIP between Ka and pKa
NEGATIVE LOGARITHM
31
* an acid is a species that can accept a pair of non-bonding electrons * a base is a species that can donate a pair of non-bonding electrons * suggest that acids react with bases, sharing a pair of electrons, with no change in the oxidation numbers of any atoms
LEWIS ELECTRON PAIR THEORY
32
LEPT: * an ____ is a species that can ACCEPT a pair of non-bonding electrons
ACID
33
LEPT: * an ACID is a species that can ______ a pair of non-bonding electrons
ACCEPT
34
LEPT: * a _____ is a species that can DONATE a pair of non-bonding electrons
BASE
35
LEPT: * a BASE is a species that can ______ a pair of non-bonding electrons
DONATE
36
* suggest that acids react with bases, SHARING A PAIR OF ELECTRONS, with NO CHANGE IN THE OXIDATION NUMBERS of any atoms
LEWIS ELECTRON PAIR THEORY
37
pH
H+ ions / acid
38
pOH
HYDROXIDE OH- / BASIC
39
defined as the NEGATIVE LOGARITHM of the H+ ion concentration of a substance
pH
40
defined as the NEGATIVE LOGARITHM of the OH– ion concentration of a substance
pOH
41
the pH scale allows us to easily classify substances based on their acidity and basicity at
25°C
42
pH level of stomach acid
1
43
ph level of vinegar
2
44
ph level of orange juice
3
45
pH level of tomato
4
46
pH level of black coffee
5
47
pH level of urine
6
48
pH level of water
7
49
pH level of sea water
8
50
pH level of baking soda
9
51
pH level of indigestion tablet
10
52
pH level of ammonia soln
11
53
pH level of soapy water
12
54
pH level of bleach
13
55
pH level of drain cleaner
14
56
low pH level
aicd
57
high pH level
alkali / basic
58
neutral ph level
5 - 7
59
measures the pH of the solution by changing its color depending on the concentration of H+ and OH– ions
pH paper
60
pH paper is treated with an indicator, which is ______, an ANTHOCYANIN commonly found in red cabbages
FLAVIN
61
flavin is commonly found in
RED CABBAGES
62
flavin usually turns: * red if the solution is
ACIDIC
63
flavin usually turns: greenish if the soln is
NEUTRAL
64
flavin usually turns: purple if the soln is
BASIC
65
- a MORE ACCURATE method than pH paper - determines the MOLAR CONCENTRATION - contains a PROBE that passes the electrical signals to the meter itself which interprets the electrical signals and display the results on its screen
pH METER
66
two electrodes that the glass pH probe contains
SENSOR ELECTRODE REFERENCE ELECTRODE
67
electrode that contains a pH 7 buffer solution
SENSOR
68
electrode that usually contains SATURATED POTASSIUM CHLORIDE SOLN
REFERENCE
69
electrodes made up of
POROUS GLASS
70
these electrodes made up of porous glass have both a silver wire covered with
SILVER CHLORIDE / CALOMEL
71
0.1 M acetic acid
ACIDIC
72
0.1 M acetamide
BASIC
73
0.1 M phenol
ACIDIC
74
0.1 M glycine
NEUTRAL
75
1% glucose
NEUTRAL
76
aniline
BASIC
77
acetone
ACIDIC TO NEUTRAL
78
isopropyl alcohol
ACIDIC

ORG CHEM LAB (20 decks)

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