CHM 113 LAB FINAL ACTUAL
EXAM 2026 WITH 200 QUESTIONS
AND EXPERT-VERIFIED ANSWERS
| ALREADY GRADED A+ |
GUARANTEED SUCCESS | CHM 113
LAB TEST EXAM
Which determination of density do YOU think has the lowest error? Why?
(Density Post Lab) - ANSWER-The determination of density with the lowest
error is likely the wood block because it was very hard to make a mistake and
the information was easily accessible.
What is the conversion factor to convert cm^3 to mL? Why? (Density Post Lab)
- ANSWER-They are equal.
What is the normal order of density for the states of matter? (Density Post Lab)
- ANSWER-Gas < Liquid < Solid
Why do ice cubes float in liquid water? (Density Post Lab) - ANSWER-Ice
cubes float in liquid water because the density of ice is less than the density of
liquid water.
,What can be said about the structure of ice and water? (Density Post Lab) -
ANSWER-Because of the hydrogen bonds in ice, it creates a structure that is
different (less packed) than that of liquid water, enabling the ice to float.
This lab is based on separation of a pure substance from impurities. What
property of adipic acid is used in the separation? (Adipic Acid Pre Lab) -
ANSWER-Solubility
Why do we use fluted filter paper (as opposed to flat filter paper)? (Adipic Acid
Pre Lab) - ANSWER-The folds in the paper make more surface area, thus more
solution contact. This speeds up the filtration process.
A student started the purification and recrystallized with a crude sample of
adipic acid that weighed 20.421 g and obtained a yield of pure adipic acid
73.5%. How much pure adipic acid was recovered? (Adipic Acid Pre Lab) -
ANSWER-0.753(20.124) = 15.2 g
The melting point of Careless Curt's adipic acid was 15 degrees below the
literature value. Was his adipic acid pure or impure? (Adipic Acid Pre Lab) -
ANSWER-Impure
What do you think Careless Curt may have done wrong? (Adipic Acid Pre Lab)
- ANSWER-He did not heat the solution long enough to melt.
What is the molecular formula of adipic acid? (Adipic Acid Quiz) - ANSWER-
H2C6H8O4
What greenhouse gas is produced by the synthesis of adipic acid? (Adipic Acid
Quiz) - ANSWER-N2O; nitric oxide
What physical property will you be using in lab today to remove the impurities
from the adipic acid? (Adipic Acid Quiz) - ANSWER-Solubility
, How many stages will it take to remove the impurities from the adipic acid?
(Adipic Acid Quiz) - ANSWER-Two stages; on the first day, you will get the
adipic acid into solution and filter out the impurities, and then the crystallization
process will begin and you will separate the crystals from the water.
In the lab you read about the solubility of adipic acid in water as it relates to the
temperature of the solution. Solubility _____ as the temperature of the water
rises. (Adipic Acid Quiz) - ANSWER-Increases
Why do you not pour liquid all on the middle of the filter paper? (Adipic Acid
Quiz) - ANSWER-It will break the paper
Why do you use fluted filter paper as opposed to flat filter paper? (Adipic Acid
Quiz) - ANSWER-More surface area is exposed and will allow for faster
filtration. `
What color should the filtrate be after it goes through the filter paper? (Adipic
Acid Quiz) - ANSWER-Colorless
What color should the pure adipic acid crystals be? (Adipic Acid Quiz) -
ANSWER-Colorless
Why is crude adipic acid brown? (Adipic Acid Quiz) - ANSWER-Because it is
not pure and contains carbon molecules and acidic molecules.
Why is eye protection required in the laboratory? (Intro Post Lab) - ANSWER-
The eyes are the most sensitive area and most important to cover in the lab.
What is the policy on doing unauthorized experiments in the lab? (Intro Post
Lab) - ANSWER-Do not do unauthorized experiments in the lab.
EXAM 2026 WITH 200 QUESTIONS
AND EXPERT-VERIFIED ANSWERS
| ALREADY GRADED A+ |
GUARANTEED SUCCESS | CHM 113
LAB TEST EXAM
Which determination of density do YOU think has the lowest error? Why?
(Density Post Lab) - ANSWER-The determination of density with the lowest
error is likely the wood block because it was very hard to make a mistake and
the information was easily accessible.
What is the conversion factor to convert cm^3 to mL? Why? (Density Post Lab)
- ANSWER-They are equal.
What is the normal order of density for the states of matter? (Density Post Lab)
- ANSWER-Gas < Liquid < Solid
Why do ice cubes float in liquid water? (Density Post Lab) - ANSWER-Ice
cubes float in liquid water because the density of ice is less than the density of
liquid water.
,What can be said about the structure of ice and water? (Density Post Lab) -
ANSWER-Because of the hydrogen bonds in ice, it creates a structure that is
different (less packed) than that of liquid water, enabling the ice to float.
This lab is based on separation of a pure substance from impurities. What
property of adipic acid is used in the separation? (Adipic Acid Pre Lab) -
ANSWER-Solubility
Why do we use fluted filter paper (as opposed to flat filter paper)? (Adipic Acid
Pre Lab) - ANSWER-The folds in the paper make more surface area, thus more
solution contact. This speeds up the filtration process.
A student started the purification and recrystallized with a crude sample of
adipic acid that weighed 20.421 g and obtained a yield of pure adipic acid
73.5%. How much pure adipic acid was recovered? (Adipic Acid Pre Lab) -
ANSWER-0.753(20.124) = 15.2 g
The melting point of Careless Curt's adipic acid was 15 degrees below the
literature value. Was his adipic acid pure or impure? (Adipic Acid Pre Lab) -
ANSWER-Impure
What do you think Careless Curt may have done wrong? (Adipic Acid Pre Lab)
- ANSWER-He did not heat the solution long enough to melt.
What is the molecular formula of adipic acid? (Adipic Acid Quiz) - ANSWER-
H2C6H8O4
What greenhouse gas is produced by the synthesis of adipic acid? (Adipic Acid
Quiz) - ANSWER-N2O; nitric oxide
What physical property will you be using in lab today to remove the impurities
from the adipic acid? (Adipic Acid Quiz) - ANSWER-Solubility
, How many stages will it take to remove the impurities from the adipic acid?
(Adipic Acid Quiz) - ANSWER-Two stages; on the first day, you will get the
adipic acid into solution and filter out the impurities, and then the crystallization
process will begin and you will separate the crystals from the water.
In the lab you read about the solubility of adipic acid in water as it relates to the
temperature of the solution. Solubility _____ as the temperature of the water
rises. (Adipic Acid Quiz) - ANSWER-Increases
Why do you not pour liquid all on the middle of the filter paper? (Adipic Acid
Quiz) - ANSWER-It will break the paper
Why do you use fluted filter paper as opposed to flat filter paper? (Adipic Acid
Quiz) - ANSWER-More surface area is exposed and will allow for faster
filtration. `
What color should the filtrate be after it goes through the filter paper? (Adipic
Acid Quiz) - ANSWER-Colorless
What color should the pure adipic acid crystals be? (Adipic Acid Quiz) -
ANSWER-Colorless
Why is crude adipic acid brown? (Adipic Acid Quiz) - ANSWER-Because it is
not pure and contains carbon molecules and acidic molecules.
Why is eye protection required in the laboratory? (Intro Post Lab) - ANSWER-
The eyes are the most sensitive area and most important to cover in the lab.
What is the policy on doing unauthorized experiments in the lab? (Intro Post
Lab) - ANSWER-Do not do unauthorized experiments in the lab.
