Chemistry 212 Final Exam WITH ANSWERS |\ |\ |\ |\ |\
Stoichiometry - CORRECT ANSWERS ✔✔The mathematical |\ |\ |\ |\ |\
description of a chemical reaction
|\ |\ |\ |\ |\
-a way to predict amount of products yielded from
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
reactants / how many reactants needed to yield X product
|\ |\ |\ |\ |\ |\ |\ |\ |\
Stoichiometry steps - CORRECT ANSWERS ✔✔1. Balanced |\ |\ |\ |\ |\ |\
chemical reaction
|\ |\
2. Convert mass to moles (n = #moles)
|\ |\ |\ |\ |\ |\ |\
3. Use coefficients as ratios
|\ |\ |\ |\
4. Cross multiply for moles
|\ |\ |\ |\
5. Multiply moles by molar mass to get grams
|\ |\ |\ |\ |\ |\ |\ |\
6. Add g of reactants and products to check if reaction
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
goes to completion |\ |\
Limiting reactant - CORRECT ANSWERS ✔✔The reactant
|\ |\ |\ |\ |\ |\ |\
that is completely consumed in a chemical reaction
|\ |\ |\ |\ |\ |\ |\
Limiting reactant steps - CORRECT ANSWERS ✔✔1.
|\ |\ |\ |\ |\ |\ |\
Balanced chemical reaction |\ |\
2. Convert grams to moles
|\ |\ |\ |\
,3. Cross multiply for grams from BOTH "points of view" to
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
find ________ _______
|\ |\
|\ -once determined, everything is from that "POV"
|\ |\ |\ |\ |\ |\
4. Cross multiply to get moles
|\ |\ |\ |\ |\
5. Multiply by molar mass to get g
|\ |\ |\ |\ |\ |\ |\
Percent yield (equation) - CORRECT ANSWERS ✔✔(Actual /
|\ |\ |\ |\ |\ |\ |\
Theoretical) x 100
|\ |\ |\
Ion concentration - CORRECT ANSWERS ✔✔Multiply M by
|\ |\ |\ |\ |\ |\ |\ |\
number of ions |\ |\
Energy - CORRECT ANSWERS ✔✔The ability to do work or
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
produce heat |\
The Law of Conservation of Energy - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔Energy cannot be created or destroyed, but energy
|\ |\ |\ |\ |\ |\ |\ |\
can be converted from one form to another
|\ |\ |\ |\ |\ |\ |\
Potential energy - CORRECT ANSWERS ✔✔Energy due to
|\ |\ |\ |\ |\ |\ |\ |\
the position or condition
|\ |\ |\
Kinetic energy (definition) - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\
✔✔Energy due to motion |\ |\ |\
, Kinetic energy (equation) - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\
✔✔1/2mv^2
v (or u) is velocity
|\ |\ |\ |\
Heat - CORRECT ANSWERS ✔✔Energy transferred
|\ |\ |\ |\ |\ |\
between two objects due to a difference in temperature
|\ |\ |\ |\ |\ |\ |\ |\
Temperature - CORRECT ANSWERS ✔✔The average |\ |\ |\ |\ |\ |\
kinetic energy of the particles in a substance
|\ |\ |\ |\ |\ |\ |\
Work - CORRECT ANSWERS ✔✔force x distance
|\ |\ |\ |\ |\ |\
State function - CORRECT ANSWERS ✔✔A property of a
|\ |\ |\ |\ |\ |\ |\ |\ |\
system that depends ONLY on its present state
|\ |\ |\ |\ |\ |\ |\
|\ -a change in state function does NOT depend on the path
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
|\ taken
|\ -ex.: enthalpy, entropy, etc.
|\ |\ |\
System - CORRECT ANSWERS ✔✔What we observe
|\ |\ |\ |\ |\ |\
Surrounding - CORRECT ANSWERS ✔✔Everything else |\ |\ |\ |\ |\ |\
besides the system |\ |\
Stoichiometry - CORRECT ANSWERS ✔✔The mathematical |\ |\ |\ |\ |\
description of a chemical reaction
|\ |\ |\ |\ |\
-a way to predict amount of products yielded from
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
reactants / how many reactants needed to yield X product
|\ |\ |\ |\ |\ |\ |\ |\ |\
Stoichiometry steps - CORRECT ANSWERS ✔✔1. Balanced |\ |\ |\ |\ |\ |\
chemical reaction
|\ |\
2. Convert mass to moles (n = #moles)
|\ |\ |\ |\ |\ |\ |\
3. Use coefficients as ratios
|\ |\ |\ |\
4. Cross multiply for moles
|\ |\ |\ |\
5. Multiply moles by molar mass to get grams
|\ |\ |\ |\ |\ |\ |\ |\
6. Add g of reactants and products to check if reaction
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
goes to completion |\ |\
Limiting reactant - CORRECT ANSWERS ✔✔The reactant
|\ |\ |\ |\ |\ |\ |\
that is completely consumed in a chemical reaction
|\ |\ |\ |\ |\ |\ |\
Limiting reactant steps - CORRECT ANSWERS ✔✔1.
|\ |\ |\ |\ |\ |\ |\
Balanced chemical reaction |\ |\
2. Convert grams to moles
|\ |\ |\ |\
,3. Cross multiply for grams from BOTH "points of view" to
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
find ________ _______
|\ |\
|\ -once determined, everything is from that "POV"
|\ |\ |\ |\ |\ |\
4. Cross multiply to get moles
|\ |\ |\ |\ |\
5. Multiply by molar mass to get g
|\ |\ |\ |\ |\ |\ |\
Percent yield (equation) - CORRECT ANSWERS ✔✔(Actual /
|\ |\ |\ |\ |\ |\ |\
Theoretical) x 100
|\ |\ |\
Ion concentration - CORRECT ANSWERS ✔✔Multiply M by
|\ |\ |\ |\ |\ |\ |\ |\
number of ions |\ |\
Energy - CORRECT ANSWERS ✔✔The ability to do work or
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
produce heat |\
The Law of Conservation of Energy - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔Energy cannot be created or destroyed, but energy
|\ |\ |\ |\ |\ |\ |\ |\
can be converted from one form to another
|\ |\ |\ |\ |\ |\ |\
Potential energy - CORRECT ANSWERS ✔✔Energy due to
|\ |\ |\ |\ |\ |\ |\ |\
the position or condition
|\ |\ |\
Kinetic energy (definition) - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\
✔✔Energy due to motion |\ |\ |\
, Kinetic energy (equation) - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\
✔✔1/2mv^2
v (or u) is velocity
|\ |\ |\ |\
Heat - CORRECT ANSWERS ✔✔Energy transferred
|\ |\ |\ |\ |\ |\
between two objects due to a difference in temperature
|\ |\ |\ |\ |\ |\ |\ |\
Temperature - CORRECT ANSWERS ✔✔The average |\ |\ |\ |\ |\ |\
kinetic energy of the particles in a substance
|\ |\ |\ |\ |\ |\ |\
Work - CORRECT ANSWERS ✔✔force x distance
|\ |\ |\ |\ |\ |\
State function - CORRECT ANSWERS ✔✔A property of a
|\ |\ |\ |\ |\ |\ |\ |\ |\
system that depends ONLY on its present state
|\ |\ |\ |\ |\ |\ |\
|\ -a change in state function does NOT depend on the path
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
|\ taken
|\ -ex.: enthalpy, entropy, etc.
|\ |\ |\
System - CORRECT ANSWERS ✔✔What we observe
|\ |\ |\ |\ |\ |\
Surrounding - CORRECT ANSWERS ✔✔Everything else |\ |\ |\ |\ |\ |\
besides the system |\ |\
