CHEM 103L Final Exam Study Guide
(Compiled from TA Study Guides)
When is food or drink allowed in the lab? Never.
What is one tool you should always use in the lab? Common sense
PPE Personal protective equipment; reduces chemical exposure. More body coverage = better
protection
Loose clothing or body parts like hair represent A hazard that can be caught against equipment (includes
dangling earrings and jewelry)
When should chemical splash googles be worn? At all times; prescription glasses must always be worn
underneath by Virginia law
What kind of shoes should you wear in the lab? They must cover the entire foot, including the top--be
closed-toe; they must be worn at all times in lab
What should be covered by clothing in the lab? That on upper body must cover torso and upper arm
area; that on lower body is recommended to cover entirety of legs
Where should broken glass go in the lab? NEVER in the trash can; ALWAYS in designated broken glass
container
When should a burner be lit? When you have surveyed the area and found it free of flammable gases
and liquids
What tool can be used to support different apparatuses? Clamps and tongs
,Beaker An open cylindrical container with a pouring lip; used for mixing larger amounts of substances
Graduated cylinder instrument used to measure volume of a liquid
Erlenmeyer flask used to hold liquids, has narrow neck to prevent splashes
Filtering funnel Used to pour liquids and prevent chemical spills
Dropping pipet used to transfer small volumes of liquids
Crucible and cover used to hold small amounts of chemicals during heating at high temperatures
Evaporating dish liquids are heated over a flame so that they evaporate, leaving a solid residue
Test tube a thin glass tube closed at one end, used to hold small amounts of material for laboratory
testing or experiments.
Florence/ Boiling Flask Used to hold/contain boiling liquids
Casserole dish small-handled, deep porcelain crucible used for heating and evaporating
Volumetric flask used for making liquid solutions of precise volumes
Watch glass to hold solids while being weighed, or as a cover for a beaker
,Plastic or glass trough apparatus used for collecting gases, such as hydrogen, oxygen and nitrogen
LabQuest used to collect sensor data with its built-in graphing and analysis application
Spectrophotometer An instrument that measures the proportions of light of different wavelengths
absorbed and transmitted by a pigment solution
Temperature probe accurately measures temperatures in celsius
Gas pressure sensor used to monitor pressure changes in gas-law experiments
pH Electrode ion-selective electrode made of a doped glass membrane that is sensitive to a specific ion
Drop counter Counts amount of liquid down to precise drop
Voltage probe used to measure the potential in DC or AC circuits
Significant figures can be done using a set of around 5 rules, with a lot of complications for how to deal
with zeroes
Zeroes are not significant when zero is for "cosmetic" purpose or when zeroes are used only to locate
the decimal point
Zeroes are significant when all zeroes between nonzero numbers or when zeroes are at the end of a
number to the right of a decimal point
Figures are significant when all nonzero integers
, How many significant figures does 500 have? 1
How many significant figures does 500. have? 3
How many significant figures does 0.0049 have? 2
How many significant figures does 0.1049 have? 4
How many significant figures does 0.004900 have? 4
Balances are usually read to how many decimal places? 3
Burets are usually read to how many decimal places? 2
Aliquot a known fraction of an entire sample
Meniscus crescent-shaped curve of surface on a liquid in a narrow tube
Which type of volumetric glassware was the most accurate? Pipet
Which type of volumetric glassware was the least accurate? Beaker
Which types of fuels can be used to operate Bunsen burners? natural gas and liquid petroleum gas
(Compiled from TA Study Guides)
When is food or drink allowed in the lab? Never.
What is one tool you should always use in the lab? Common sense
PPE Personal protective equipment; reduces chemical exposure. More body coverage = better
protection
Loose clothing or body parts like hair represent A hazard that can be caught against equipment (includes
dangling earrings and jewelry)
When should chemical splash googles be worn? At all times; prescription glasses must always be worn
underneath by Virginia law
What kind of shoes should you wear in the lab? They must cover the entire foot, including the top--be
closed-toe; they must be worn at all times in lab
What should be covered by clothing in the lab? That on upper body must cover torso and upper arm
area; that on lower body is recommended to cover entirety of legs
Where should broken glass go in the lab? NEVER in the trash can; ALWAYS in designated broken glass
container
When should a burner be lit? When you have surveyed the area and found it free of flammable gases
and liquids
What tool can be used to support different apparatuses? Clamps and tongs
,Beaker An open cylindrical container with a pouring lip; used for mixing larger amounts of substances
Graduated cylinder instrument used to measure volume of a liquid
Erlenmeyer flask used to hold liquids, has narrow neck to prevent splashes
Filtering funnel Used to pour liquids and prevent chemical spills
Dropping pipet used to transfer small volumes of liquids
Crucible and cover used to hold small amounts of chemicals during heating at high temperatures
Evaporating dish liquids are heated over a flame so that they evaporate, leaving a solid residue
Test tube a thin glass tube closed at one end, used to hold small amounts of material for laboratory
testing or experiments.
Florence/ Boiling Flask Used to hold/contain boiling liquids
Casserole dish small-handled, deep porcelain crucible used for heating and evaporating
Volumetric flask used for making liquid solutions of precise volumes
Watch glass to hold solids while being weighed, or as a cover for a beaker
,Plastic or glass trough apparatus used for collecting gases, such as hydrogen, oxygen and nitrogen
LabQuest used to collect sensor data with its built-in graphing and analysis application
Spectrophotometer An instrument that measures the proportions of light of different wavelengths
absorbed and transmitted by a pigment solution
Temperature probe accurately measures temperatures in celsius
Gas pressure sensor used to monitor pressure changes in gas-law experiments
pH Electrode ion-selective electrode made of a doped glass membrane that is sensitive to a specific ion
Drop counter Counts amount of liquid down to precise drop
Voltage probe used to measure the potential in DC or AC circuits
Significant figures can be done using a set of around 5 rules, with a lot of complications for how to deal
with zeroes
Zeroes are not significant when zero is for "cosmetic" purpose or when zeroes are used only to locate
the decimal point
Zeroes are significant when all zeroes between nonzero numbers or when zeroes are at the end of a
number to the right of a decimal point
Figures are significant when all nonzero integers
, How many significant figures does 500 have? 1
How many significant figures does 500. have? 3
How many significant figures does 0.0049 have? 2
How many significant figures does 0.1049 have? 4
How many significant figures does 0.004900 have? 4
Balances are usually read to how many decimal places? 3
Burets are usually read to how many decimal places? 2
Aliquot a known fraction of an entire sample
Meniscus crescent-shaped curve of surface on a liquid in a narrow tube
Which type of volumetric glassware was the most accurate? Pipet
Which type of volumetric glassware was the least accurate? Beaker
Which types of fuels can be used to operate Bunsen burners? natural gas and liquid petroleum gas
