CHM 113 LAB FINAL LAB QUESTIONS
& ANSWERS 100 ANSWERS 100%
CORRECT
Safety Quiz - ANSWER
When is it important to wear safety goggles in the laboratory? - ANSWERAnytime
there are chemicals or laboratory equipment present in the lab
When you read the label on a chemical container, what are the 3 most important
pieces of information? (Choose three answers.) - ANSWER- the concentration
- any hazardous warnings
- the chemical name
What should you do with chemicals leftover after an experiment? - ANSWERdispose
of any used or unused chemicals in the proper waste containers
If you spill a liquid chemical, what is the first thing you should do? - ANSWERtell
your teacher about the spill
Should you add concentrated acid to water or add water to concentrated acid? -
ANSWERadd acid to water with constant stirring
Before hooking a Bunsen burner to the gas line, what should you do? -
ANSWERcheck to make sure there are no cracks or holes in the connecting hose
When using a gas burner in the lab, what should you do if the flame sputters, goes
out, or you smell gas in the room? - ANSWERturn off the gas source by closing the
stopcock
A student determines the mass of a sample of water by determining the mass of an
empty container (99.20 g) and the mass of the container including the sample of
water (108.23 g). Use significant rules (for subtracting) to determine the mass of the
water sample alone, to the correct number of significant figures. - ANSWER9.03 g
After determining the density of three samples of water, each at 22.0 degrees
celsius, Anna calculated an average density for the three trials to be 1.048 g/mL.
Use the following link:
http://jupiter.plymouth.edu/~jsduncan/courses/2012_Spring/Techniques/Exams/
DensityOfWater-vs-Temp.pdf (Links to an external site.) to find the accepted density
value of water at this temperature, and calculate the percent error for her average
density result. - ANSWER5.034%
When is it safe to use glassware that has cracks or stars? - ANSWERNever
, True or False. It is safe to heat flammable liquids with a Bunsen burner as long as it's
done in a fume hood. - ANSWERFalse
What is the proper way to carry/move a heated object? - ANSWERwith the proper
tongs/test tube holder or with hot mitts
What types of shoes are appropriate for the lab? - ANSWERhard shoes with tops
and closed bottoms
What is the proper method to smell a chemical if required in lab? - ANSWERplace
your nose away from the mouth of the container and gently waft the odor toward
your nose
How can you protect your hands when working with corrosive chemicals? -
ANSWERcover your hands using appropriate gloves provided by my lab TA
When is it appropriate to taste a chemical or solution? - ANSWERlab chemicals
should never be tasted
How should you protect your eyes from chemicals and glass shards in the lab? -
ANSWERwear proper fitting goggles with side shields
True or False. It is never appropriate/safe to eat, drink or put on makeup in the
laboratory. - ANSWERtrue
Where should you keep your personal belongings that you bring to lab? -
ANSWERoff the floor, out of the way, preferably on a shelf on the side of the room
Chemicals splash in my eye(s) - ANSWERWash my eyes in eye wash station
My lab partner hurts their hand - ANSWERcall 911 and tell my TA
There is a small, isolated fire on the lab bench - ANSWERattempt to smother the fire
by putting a container on top of the flames
My shirt catches on fire - ANSWERstop, drop, and roll or use the fire extinguisher
A larger fire occurs - ANSWERtell my TA and move away from the fire
Any injury occurs to me in lab - ANSWERtell my TA and fill out appropriate
paperwork
Glassware Lab - ANSWER
True or False. Although chemicals aren't used in this investigation, glassware will be
used, so PPE is required. - ANSWERTrue
The dots on the figure represent the points hit by a set of 6 darts when trying to hit
the target in the very center. Which diagram represents the greatest accuracy for the
& ANSWERS 100 ANSWERS 100%
CORRECT
Safety Quiz - ANSWER
When is it important to wear safety goggles in the laboratory? - ANSWERAnytime
there are chemicals or laboratory equipment present in the lab
When you read the label on a chemical container, what are the 3 most important
pieces of information? (Choose three answers.) - ANSWER- the concentration
- any hazardous warnings
- the chemical name
What should you do with chemicals leftover after an experiment? - ANSWERdispose
of any used or unused chemicals in the proper waste containers
If you spill a liquid chemical, what is the first thing you should do? - ANSWERtell
your teacher about the spill
Should you add concentrated acid to water or add water to concentrated acid? -
ANSWERadd acid to water with constant stirring
Before hooking a Bunsen burner to the gas line, what should you do? -
ANSWERcheck to make sure there are no cracks or holes in the connecting hose
When using a gas burner in the lab, what should you do if the flame sputters, goes
out, or you smell gas in the room? - ANSWERturn off the gas source by closing the
stopcock
A student determines the mass of a sample of water by determining the mass of an
empty container (99.20 g) and the mass of the container including the sample of
water (108.23 g). Use significant rules (for subtracting) to determine the mass of the
water sample alone, to the correct number of significant figures. - ANSWER9.03 g
After determining the density of three samples of water, each at 22.0 degrees
celsius, Anna calculated an average density for the three trials to be 1.048 g/mL.
Use the following link:
http://jupiter.plymouth.edu/~jsduncan/courses/2012_Spring/Techniques/Exams/
DensityOfWater-vs-Temp.pdf (Links to an external site.) to find the accepted density
value of water at this temperature, and calculate the percent error for her average
density result. - ANSWER5.034%
When is it safe to use glassware that has cracks or stars? - ANSWERNever
, True or False. It is safe to heat flammable liquids with a Bunsen burner as long as it's
done in a fume hood. - ANSWERFalse
What is the proper way to carry/move a heated object? - ANSWERwith the proper
tongs/test tube holder or with hot mitts
What types of shoes are appropriate for the lab? - ANSWERhard shoes with tops
and closed bottoms
What is the proper method to smell a chemical if required in lab? - ANSWERplace
your nose away from the mouth of the container and gently waft the odor toward
your nose
How can you protect your hands when working with corrosive chemicals? -
ANSWERcover your hands using appropriate gloves provided by my lab TA
When is it appropriate to taste a chemical or solution? - ANSWERlab chemicals
should never be tasted
How should you protect your eyes from chemicals and glass shards in the lab? -
ANSWERwear proper fitting goggles with side shields
True or False. It is never appropriate/safe to eat, drink or put on makeup in the
laboratory. - ANSWERtrue
Where should you keep your personal belongings that you bring to lab? -
ANSWERoff the floor, out of the way, preferably on a shelf on the side of the room
Chemicals splash in my eye(s) - ANSWERWash my eyes in eye wash station
My lab partner hurts their hand - ANSWERcall 911 and tell my TA
There is a small, isolated fire on the lab bench - ANSWERattempt to smother the fire
by putting a container on top of the flames
My shirt catches on fire - ANSWERstop, drop, and roll or use the fire extinguisher
A larger fire occurs - ANSWERtell my TA and move away from the fire
Any injury occurs to me in lab - ANSWERtell my TA and fill out appropriate
paperwork
Glassware Lab - ANSWER
True or False. Although chemicals aren't used in this investigation, glassware will be
used, so PPE is required. - ANSWERTrue
The dots on the figure represent the points hit by a set of 6 darts when trying to hit
the target in the very center. Which diagram represents the greatest accuracy for the
