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LAB - PORG121 > pH Determination (EXPT 2) > Flashcards

pH Determination (EXPT 2) Flashcards

1
Q

pH of 0 - <7

A

Acids

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2
Q

React with metals and bases.

A

Acids

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3
Q

Tend to taste sour.

A

Acids

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4
Q

Give off / contribute H+ ions into a solution.

A

Acids

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5
Q

aq stands for?

A

aqueous

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6
Q

A solution in which the solvent is water (dissolved in water).

A

aqueous (aq)

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7
Q

pH of > 7 - 14

A

Bases

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8
Q

Do not react with metals

A

Bases

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9
Q

React with acids

A

Bases

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10
Q

Tend to taste bitter

A

Bases

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11
Q

Give off / contribute hydroxide ions (OH-) to a solution.

A

Bases

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12
Q

pH of 7

A

Neutral

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13
Q

Neither acidic nor basic.

A

Neutral

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14
Q

Pure water is an example of?

A

Neutral

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15
Q

We can neutralize an acid with a base, or neutralize a base with an acid.

A

Neutralization

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16
Q

Ex. There are bases secreted in our intestines that neutralize the acid from our stomach.

A

Neutralization

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17
Q

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

A

Indicator

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18
Q

Cabbage juice & litmus paper is an example of?

A

Indicator

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19
Q

Indicators change over a ____ space of pH, not sharply at one particular pH

A

narrow

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20
Q

Litmus paper pK

A

6.5

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21
Q

Methyl Orange pK

A

3.7

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22
Q

Phenolphthalein pK

A

9.3

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23
Q

Litmus turns ___ when adding hydrogen ions.

A

Red

24
Q

Litmus turns _____ when adding hydroxide ion.

A

Blue

25
Q

A chemical compound with the formula C20H14O4 (often written as “HIn” or “phph”.

A

Phenolphthalein

26
Q

Often used in titrations, it turns colorless in acidic solution and pink in basic solution.

A

Phenolphthalein

27
Q

An intensely colored compound used in dyeing and printing textiles.

A

Methyl Orange

28
Q
  • C.I. Acid Orage 52
  • C.I. 13025
  • helianthine B
  • Orange III
  • Gold orange
  • Tropaeolin D.
A

Methyl Orange

29
Q

Chemists use methyl orange as a indicator in the titration of ____ bases with ____ acids. It changes from red (pH 3.1) to orange-yellow (pH 4.4).

A

weak bases , strong acids

30
Q

A measure of hydrogen ion concentration, [H+], in an aqueous (water) solution.

A

pH

31
Q

Formulas of pH

A

pH = -log [H+]
pOH = -log [OH-]
pH + pOH = 14

32
Q

The measures of the strengths of acids and bases, respectively.

A

pKa and pKb

33
Q

The operator p may mean “take the ______ logarithm of”.

A

Negative

34
Q

The smaller the value of pKa, the ______ the acid.

A

Stronger

35
Q

The smaller the value of pKb , the _______ the base.

A

Stronger

36
Q

Acid dissociation constant.

A

Ka

37
Q

The greater the value of Ka , the ______ the acid.

A

Stronger

38
Q

Base dissociation constant.

A

Kb

39
Q

The greater the value of Kb , the ______ the base.

A

Stronger

40
Q

______ bases grab protons more greedily.

A

Strong

41
Q

Indication of Paracetamol.

A

Antipyretic, Analgesic

42
Q

Direction to use of Paracetamol.

A

PO (by mouth)

43
Q

Do not take this medication for fever for more than 3 days unless directed by your doctor. For adults, do not take this product for pain for more than 10 days (5 days in children) unless directed by your doctor.

A

Paracetamol

44
Q

pH range of Paracetamol

A

5.5 - 6.5

45
Q

Indication of Maalox

A

Antacid - used to treat the symptoms of too much stomach acid such as stomach upset, heartburn, and acid indigestion.

46
Q

Direction for Use of Maalox

A

PO, after meals

47
Q

If your acid problems persist or worsen after you have used this product for 1 week, seek immediate medical attention.

A

Maalox

48
Q

pH range of Maalox

A

Approximately 8

49
Q

Indication of Ceelin

A

Prevention and treatment of Vitamin
C deficiency in infants and children.

The most trusted and most prescribed Vitamin C supplement for kids which helps boost the immune system for their protection from sickness.

50
Q

Direction for Use of Ceelin

A

PO, with or without food

51
Q

pH range of Ceelin

A

1.0 to 2.5

52
Q

Formula of Phenolphthalein.

A

C20H14O4

53
Q

Phenolphthalein turns ____ in acidic solutions.

A

Colorless

54
Q

Phenolphthalein turns ____ in basic solutions.

A

Pink

55
Q

Title of Experiment 2?

A

pH Determination

LAB - PORG121 (3 decks)

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