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PORG LAB > LAB#2 > Flashcards

LAB#2 Flashcards

1
Q

What is the title of the experiment number 2

A

pH Determination

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2
Q

It has a pH of 0 to less than 7

It reacts with metals and bases and tends to taste sour

A

Acids

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3
Q

It gives off or contribute hydrogen ions into a solution

A

Acids

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4
Q

It is a solution in which the solvent is water

A

Aqueous

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5
Q

It has a pH of greater than 7 to 14

It do not react with metals but it react with acids and tend to taste bitter

A

Bases

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6
Q

It give off or contribute hydroxide ions to a solution

A

Bases

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7
Q

It has a pH of 7 neither acidic nor basic an example of this is pure water

A

Neutral

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8
Q

We can neutralize an acid with the base or neutralize a base with an acid

A

Neutralization

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9
Q

A substance that changes color in the presence of an acid or base

A

Indicator

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10
Q

Give an example of indicators

A

Cabbage juice or litmus paper

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11
Q

Examples of indicators used in acid base reaction

A

Litmus
Phenolphthalein
Methyl orange

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12
Q

pH range of methyl orange

A

4-6

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13
Q

pH range of bromophenol blue

A

6-7

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14
Q

pH range of thymol blue

A

8-9

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15
Q

pH range of phenolphthalein

A

9-10

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16
Q

pH range of alizarin yellow

A

10-12

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17
Q

Methyl orange color for weak acid and conjugate base

A

Weak Acid: orange

Conjugate Base: yellow

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18
Q

Bromophenol blue color for weak acid and conjugate base

A

Weak acid: yellow

Conjugate base: blue

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19
Q

Thymol blue color for weak acid and conjugate base

A

Weak acid: yellow

Conjugate base: blue

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20
Q

Phenolphthalein color for weak acid and conjugate base

A

Weak acid: colorless

Conjugate base: pink

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21
Q

Alizarin yellow color for weak acid and conjugate base

A

Weak acid: yellow

Conjugate base: red

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22
Q

Litmus paper pK indicator

A

6.5

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23
Q

Methyl orange pK indicator

24
Q

Phenolphthalein pK indicator

25
Q

Litmus paper:

Blue to Red=

26
Q

Litmus paper:

Red-Blue =

27
Q

Is a chemical compound with the formula C20H1404

A

Phenolphthalein

28
Q

Phenolphthalein is often written as

A

HIn or phph

29
Q

It is often used in titrations and it turns colorless in acidic solutions and pink in basic solutions

A

Phenolphthalein

30
Q

Is an intensely colored compound used in dying and painting textiles

A

Methyl orange

31
Q

Other names of methyl orange includes

A

C.I. Acid orange 52
C.I. 13025
helianthine B
Orange III
Gold Orange
Tropaeolin D

32
Q

It is used by the chemist as an indicator in the titration of weak bases with strong acids

A

Methyl orange

33
Q

Methyl orange changes from ___ to ___

A

Red (3.1) to orange yellow (4.4)

34
Q

It is a measure of hydrogen ion concentration in an aqueous water solution

35
Q

Formula for pH

A

pH= -log(H+)

36
Q

Formula for POH

A

pOH= -log(OH-)

37
Q

At 25° C

38
Q

These are measures of the strengths of acids and bases respectively

A

pKa and pKb

39
Q

The operator P may mean

A

Take the negative logarithm of

40
Q

Formula for acids

A

pKa= -log Ka

41
Q

The____the value of pKa, the____ the acid

A

Smaller

Stronger

42
Q

Formula for base

A

pKb= -log(Kb)

43
Q

The ___ the value of pKb, the ____ the base

A

Smaller

Stronger

44
Q

It is the acid dissociation constant

45
Q

The __ the value of Ka, the ___ the acid

A

Greater

Stronger

46
Q

Is the base dissociation constant

47
Q

The ___ the value of Kb, the ___ the base

A

Greater

Stronger

48
Q

What is the indication of paracetamol

A

Antipyretic and analgesic

49
Q

Direction to use of paracetamol

A

PO or by mouth

50
Q

pH range of paracetamol

A

5.5 to 6.5

51
Q

It is used to treat the symptoms of too much stomach acid such a stomach upset heartburn and acid indigestion

52
Q

What is the direction for use of Maalox

A

PO or by mouth after meals

53
Q

What is the approximate pH range of maalox

54
Q

What is the indication of Ceelin

A

Prevention and treatment of vitamin C deficiency in infants and children

55
Q

It is the most trusted and most prescribed vitamin C supplement for kids which helps boost the immune system for their protection from sickness

56
Q

Direction for use of Ceelin

A

PO or by mouth, with or without meals

57
Q

pH range of Ceelin

PORG LAB (8 decks)

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