Page 1 of 24
CHM 113 FINAL EXAM | FREQUENTLY TESTED
QUESTIONS WITH CORRECT ANSWERS |
BRAND NEW!
What is a base? - ✔✔✔ Correct Answer > chemical species that
donates electrons or hydroxide ions or that accepts protons
(proton acceptor)
In July 2005, Hurricane Dennis hit the Gulf coast of Florida with a
central pressure of 949 mbar (=711.8 torr), what was the pressure
in atm? - ✔✔✔ Correct Answer > 1 atm = 760 torr
711.8 torr = 711. atm
= 0.936 atm
What would Pw be in torr if the height of a water column in a gas
buret was 26.2 cm? - ✔✔✔ Correct Answer > Pw = 262 mm / 13.6 =
19.265 torr
Define pH - ✔✔✔ Correct Answer > a numeric scale used to specify the
acidity of basicity of an aqueous solution
,Page 2 of 24
When using litmus paper in the presence of a base what color
does it turn? In the presence of an acid? - ✔✔✔ Correct Answer > Base
= blue
Acid = red
If the pH of a solution is 9.3, what is the [OH-]? - ✔✔✔ Correct Answer
> 14-9.3 = 1 x 10 ^ -4.7
Acid - ✔✔✔ Correct Answer > proton donor; sour in taste; turns red on
litmus paper
Base - ✔✔✔ Correct Answer > proton acceptor; bitter in taste; turns
blue on litmus paper
Indicator - ✔✔✔ Correct Answer > tests something being measured
I will not do any taste testing in lab today - ✔✔✔ Correct Answer > True
During the experiment, what can NOT go down the sinks? - ✔✔✔
Correct Answer > solids (baking soda, washing soda, etc.)
Why do you bring the red cabbage to a boil? What can happen if
you boil it for too long? - ✔✔✔ Correct Answer > because the cabbage
, Page 3 of 24
contains natural dyes and pigments that will change with acids
and bases. if you boil the cabbage for too long it will denature
The pOH of a solution is 4.87, with this information answer the
questions:
1. What is the [OH-]?
2. What is the pH?
3. What is the [H3O+]? - ✔✔✔ Correct Answer > 1. 1 x 10^-4.87
2. 14 - 4.87 = 9.13
3. 1 x 10^9.13
TYPES OF REACTIONS - ✔✔✔ Correct Answer > aka the worst...
Na2SO4 + Ba(NO3)2 --> 2NaNO3 + BaSO4 - ✔✔✔ Correct Answer >
precipitation
Sn2+ --> Sn3+ + e- - ✔✔✔ Correct Answer > oxidation
Fe3+ + e- --> Fe2+ - ✔✔✔ Correct Answer > reduction
A + B --> AB - ✔✔✔ Correct Answer > combination
CHM 113 FINAL EXAM | FREQUENTLY TESTED
QUESTIONS WITH CORRECT ANSWERS |
BRAND NEW!
What is a base? - ✔✔✔ Correct Answer > chemical species that
donates electrons or hydroxide ions or that accepts protons
(proton acceptor)
In July 2005, Hurricane Dennis hit the Gulf coast of Florida with a
central pressure of 949 mbar (=711.8 torr), what was the pressure
in atm? - ✔✔✔ Correct Answer > 1 atm = 760 torr
711.8 torr = 711. atm
= 0.936 atm
What would Pw be in torr if the height of a water column in a gas
buret was 26.2 cm? - ✔✔✔ Correct Answer > Pw = 262 mm / 13.6 =
19.265 torr
Define pH - ✔✔✔ Correct Answer > a numeric scale used to specify the
acidity of basicity of an aqueous solution
,Page 2 of 24
When using litmus paper in the presence of a base what color
does it turn? In the presence of an acid? - ✔✔✔ Correct Answer > Base
= blue
Acid = red
If the pH of a solution is 9.3, what is the [OH-]? - ✔✔✔ Correct Answer
> 14-9.3 = 1 x 10 ^ -4.7
Acid - ✔✔✔ Correct Answer > proton donor; sour in taste; turns red on
litmus paper
Base - ✔✔✔ Correct Answer > proton acceptor; bitter in taste; turns
blue on litmus paper
Indicator - ✔✔✔ Correct Answer > tests something being measured
I will not do any taste testing in lab today - ✔✔✔ Correct Answer > True
During the experiment, what can NOT go down the sinks? - ✔✔✔
Correct Answer > solids (baking soda, washing soda, etc.)
Why do you bring the red cabbage to a boil? What can happen if
you boil it for too long? - ✔✔✔ Correct Answer > because the cabbage
, Page 3 of 24
contains natural dyes and pigments that will change with acids
and bases. if you boil the cabbage for too long it will denature
The pOH of a solution is 4.87, with this information answer the
questions:
1. What is the [OH-]?
2. What is the pH?
3. What is the [H3O+]? - ✔✔✔ Correct Answer > 1. 1 x 10^-4.87
2. 14 - 4.87 = 9.13
3. 1 x 10^9.13
TYPES OF REACTIONS - ✔✔✔ Correct Answer > aka the worst...
Na2SO4 + Ba(NO3)2 --> 2NaNO3 + BaSO4 - ✔✔✔ Correct Answer >
precipitation
Sn2+ --> Sn3+ + e- - ✔✔✔ Correct Answer > oxidation
Fe3+ + e- --> Fe2+ - ✔✔✔ Correct Answer > reduction
A + B --> AB - ✔✔✔ Correct Answer > combination
