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Inorganic and Organic Chemistry > Chemical Safety, Copper Reactions, Freezing Point Depression > Flashcards

Chemical Safety, Copper Reactions, Freezing Point Depression Flashcards

1
Q

refers to the protection of people and the environment from chemical hazards

A

chemical safety

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2
Q

is a type of occupational hazard that is caused by exposure to various chemicals in the workplace and other places where they are used as school laboratory and even at home

A

chemical hazard

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3
Q

is the international standard agreed upon by various countries under the auspices of the United Nations in defining and classifying chemical hazards and communicating these hazards

A

globally harmonized system of classification of labeling of chemicals

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4
Q

enforces the GHS

A

occupational health and safety (OHS)

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5
Q

in the Philippines, is the enforcing agency under the Department of Labor and Employment (DOLE)

A

Occupational Safety and Health Center (OSHC)

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6
Q

chemical hazards are classified into three main hazard groups namely

A

physical
health
environmental

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7
Q

refer to chemical agents that can cause harm with or without contact

A

physical hazards

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8
Q

physical hazards can be (8)

A

explosive substances
flammable liquids
flammable solids
flammable gases
oxidizing substances
toxic and infectious substances
corrosive substances
misc. dangerous susbtances to the environment

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9
Q

refer to chemical agents that can deleteriously affect one’s health

A

health hazards

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10
Q

health hazards can be (6)

A

acutely toxic chemicals
chemical irritants and sensitizers
mutagenic substances
carcinogenic substances
reproductive toxicants
chemical with specific target organ of toxicity (STOT)

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11
Q

refer to chemicals that are particularly toxic to aquatic organisms on short-term or long-term exposure

A

environmental hazards

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12
Q

made up of a red diamond in a white background with the universally-established symbol for nine general chemical hazards

A

chemical hazard symbol or pictogram

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13
Q

physical hazard in detonating bomb

A

explosion hazard

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14
Q

physical hazard in gas cylinder

A

gas under pressure

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15
Q

physical hazard in test tube with a chemical that corrodes a metal or skin on the human hand

A

corrosion hazard

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16
Q

physical hazard in flame over circle

A

oxidizers

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17
Q

meaning of skull and cross bone

A

acutely toxic and poisonous substance

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18
Q

meaning of suffocating head

A

general head hazard

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19
Q

used for less acutely toxic chemicals which is also a health hazard

A

exclamation point

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20
Q

symbol used for environmental hazard

A

dying fish and tree

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21
Q

identify the GHS hazard symbol/pictogram

A

grade yourself accordingly

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22
Q

process of conveying chemical hazards through chemical labeling and safety data sheets

A

hazard communication

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23
Q

it is the name of the chemical product. The UN number pertains to four-digit United Nations product identifier number for hazardous material in the framework of international transport

A

product identifier

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24
Q

which is the internationally-accepted unique numerical identifier assigned to all known chemical substances described in its open scientific literature

A

chemical abstract service number

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25
Q

it is the hazard level associated with a chemical where “danger” signifies the most severe hazard while “warning” signifies a less severe one

A

signal word

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26
Q

these are phrases that describe the hazardous nature and degree of the product that is reflected on the chemical’s SDS

A

hazard statement

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27
Q

these are phrases that describe the general precautions in the use, storage, and/or disposal of a chemical which is also reflected in its SDS

A

precautionary statement

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28
Q

it gives the name, address, and contact details of the chemical supplier/manufacturer of the chemical product

A

supplier identification

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29
Q

these are the universal chemical hazard symbols associated with a chemical as per GHS standard

A

hazard symbols/pictogram

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30
Q

a technical sheet that gives a concise yet comprehensive safety information on chemical product or its mixtures

A

safety data sheet

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31
Q

has a total of 16 sections

A

GHS-compliant SDS

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32
Q

require the availability of SDS for all chemical used in the workplace including academic laboratories

A

Occupational Safety and Health (OSH) standards

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33
Q

used as a household toilet cleaner is concentrated hydrochloric acid (HCl) although in laboratory grade

A

muriatic acid

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34
Q

when used with HCl generates toxic chlorine gas

A

bleach

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35
Q

equipment worn to minimize exposure to any workplace hazard, when working with chemicals

A

personal protective equipment (PPE)

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36
Q

example of PPE

A

laboratory gown
goggles
gloves
closed shoes
face mask

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37
Q

proper ventilation and laboratory safety equipment are essential when working with chemicals

A

engineering controls

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38
Q

standard features in a chemical laboratory to prevent its contamination with chemical fumes

A

fume hood and exhaust fans

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39
Q

include metals, minerals and non-metals

A

inorganic chemicals

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40
Q

carbon-containing chemicals

A

organic chemicals

41
Q

based on these, each chemical group was subdivided into compatible chemical family

A

reactivity

42
Q

within this, the various chemicals may then be arranged alphabetically for easier identification and self-designed systematic codes may also be incorporated for more efficient inventory purpose

A

compatible family

43
Q

some chemicals require specific storage

A

corrosive and flammable chemicals

44
Q

inorganic acids and some organic acids that are best kept in a corrosive/acid cabinet which is made up of wood with acid-resistant epoxy coating or dense plastic material

A

corrosive chemicals

45
Q

never store corrosive chemicals in these as it is prone to corrosion by the acids

A

metal cabinets

46
Q

examples include alcohol, ethers, ketones, and hydrocarbons

A

flammable chemicals

47
Q

material of cabinets where flammable chemicals can be stored,

A

dense steel

48
Q

used to evaluate a chemical reactio

A

balanced chemical equation

49
Q

Shows the reactants and products

A

balanced chemical equation

50
Q

Gives the number of moles of each substances used and produced

A

balanced chemical equation

51
Q

the maximum amount of the product formed from a given amount of the reactants based on the balanced chemical equation

A

theoretical yield

52
Q

the amount of product that is finally obtained after carrying out a reaction

A

actual yield

53
Q

computed with the ratio of the actual yield to the theoretical yield multiplied by 100

A

percent yield

54
Q

percent yield formula

A

actual yield / theoretical yield x 100

55
Q

reaction that allowed for the recovery of copper whose mass will be determined to calculate for the % yield

A

CuSO4 (aq) + Zn (s) -> Cu (S) + ZnSO4 (aq)
Cupric sulfate + Zinc -> Copper + Zinc sulfate

56
Q

observation with the addition of HNO3 to copper wire

A

solution dissolved the copper metal, the color changed into green and produced red fumes

57
Q

observation in addition of distilled water to the reaction mixture

A

the diluted solution turns into a light blue hue

58
Q

addition of NaOH to the solution

A

light blue solution turns into a deep blue solution

59
Q

heating the reaction mixture

A

deep blue solution turns into a black color

60
Q

addition of H2SO4 to the black precipitate

A

the solution cleared up and turned into blue

61
Q

addition of Zn to reaction mixture

A

black precipitate dispersed into red solids and likewise dissolved

62
Q

is the temperature at which the liquid and solid phase of the substance exist in equilibrium with each other

A

freezing point

63
Q

one can determine the freezing point by plotting this

A

cooling curve

64
Q

solution containing these can lower the freezing point of the solution compared with that of a pure solvent

A

nonvolatile solute

65
Q

colligative property of a solution that is dependent on the amount of the solute and not on the nature of the solute particles

A

freezing point depression

66
Q

symbol for freezing point depression

A

𝛥𝑇𝑓

67
Q

other colligative properties include

A

boiling point elevation
vapor pressure lowering
osmotic pressure

68
Q

formula for freezing point depression

A

𝛥𝑇𝑓 = Kfm

69
Q

Kf means

A

molal freezing point depression constant that is dependent on the solvent

70
Q

m means

A

molality of the solution

71
Q

molality of the solution formula

A

moles of solution / mass in kg solvent

72
Q

technique that is used to experiment and acquire information about a solution containing an acid or base

A

acid-base titration

73
Q

an analytical chemistry technique used to find an unknown concentration of an analyte (the titrand) by reacting it with a known volume and concentration of a standard solution (titrant)

A

acid-base titration

74
Q

analyte

75
Q

standard solution

76
Q

typically used for acid-base reactions and redox reactions, help determine their acidic or basic properties

A

titrations

77
Q

decides the endpoint in Titration

78
Q

used to calculate the amount of a known acidic or basic substance through acid-base reactions

A

acid-base titration

79
Q

latin word where Titration come from which means an inscription or title

80
Q

implies the determination of the concentration or rank of a solution with respect to water with a pH of 7

81
Q

added from an apparatus known as the burette

A

standard solution

82
Q

the process of adding a standard solution until the reaction is complete

83
Q

specific conditions that reactions can be considered as titrations

A

Reaction has to be fast

Change in free energy during the reaction must be large enough for the spontaneity of the reaction

There must be always a way to decide the completion of the reaction

84
Q

stage that shows the completion of reaction

85
Q

Detected by a physical change that is produced by the solution itself or by the addition of a reagent known as an indicator

86
Q

stage where the amount of reagent added is exactly equivalent to the amount of reacting substance in the titrated solution

A

equivalent point

87
Q

At the equivalence point in an acid-base titration (neutralization), the moles of the acid are what to the moles of the base

88
Q

show the relation between the moles of the acid and volume of the acid to the moles of the base to the volume of the base

A

MacidVacid = MbaseVbase

89
Q

typically detected only after the addition of a slight excess amount of titrant

90
Q

amounts to an error to the experiment

A

difference between endpoint and equivalent point

91
Q

is when a solution of unknown strength adds to a specific volume of a treated sample containing an indicator

92
Q

the main active ingredient in vinegar, a common household product that is used for cooking and even for cleaning

A

acetic acid

93
Q

percentage of acetic acid in commercially available vinegar

A

4-7 percent

94
Q

used as a titrant to react with the acetic acid in vinegar based on the reaction:

95
Q

reaction between acetic acid and sodium hydroxide

A

HC2H3O2 + NaOH -> NaC2H3O2 + H2O

96
Q

type of reaction which takes place in the presences of phenolphthalein

A

neutralization

97
Q

completion of reaction can be monitored by the change in color of the phenolphthalein

A

light pink

98
Q

m/v percent formula

A

g of mass / vol of solution x 100

Inorganic and Organic Chemistry (19 decks)

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