Font size
WorksheetsAP Chemistry Thou Shall Not Forget- Part 2
Total questions: 58
Worksheet time: 26mins
What type of alloy is made when the radii of the atoms are similar in size?
interstitial
substitutional
This is a representation of a hydrogen bond.
True
False
This is a representation of a hydrogen bond.
True
False
Which atom has the negative dipole in this molecule?
Hydrogen
Fluorine
Neither
In this molecule, Carbon has a formal charge of ____ and Nitrogen has a formal charge of _____.
0, 0
1, 0
0, -1
-1, 0
What is the formula for calculating % yield?
actual/theoretical *100
theoretical/actual *100
What is a limiting reactant?
The reactant that runs out first
The reactant that has the lowest mass
The reactant with the smallest coefficient
The reactant with the lowest molar mass
Combustion reactions produce what two substances?
Water Vapor and Carbon Dioxide
Carbon Dioxide and Oxygen
Oxygen and Water Vapor
As the electronegativity difference between 2 atoms increases, the polarity of the bond ____________________
increases
decreases
What type of bond forms between hydrogen and chlorine?
polar covalent
non-polar covalent
ionic
hydrogen bond
What type of alloy is this?
Interstitial
Substitutional
dRT/P equals what quantity?
Molar mass
Volume
Vapor pressure
Mass
What is the unit for the rate constant (k) for 1st order reactions?
s-1
M/s
M-1s-1
What is the oxidation number of P in PO43-?
0
4
5
-2
What formula do we use for dilution calculations?
M1V1=M2V2
D=m/V
V1=M2
Total Volume/Partial Volume
What order is this graph?
Zero
First
Second
Third
What order is this graph?
Zero
First
Second
Third
What is the oxidation number of N in NO21-?
0
-1
2
3
The lewis structure on the ___________ is better because ________________
left, formal charges are zero
left, the formal charges equal -1
right, formal charges are zero
right, the formal charges equal -1
If you quadruple the concentration and the rate quadruples, what order is this reaction?
zero
first
second
What is the electron configuration of Phosphorus?
1s2 2s2 2p6 3s2 3p3
1s2 2s2 2p6 3s2
1s2 2s2 2p6 3s2 4p3
1s2 2s2 2p6 3s2 3p5
Which step of a reaction mechanism determines the rate?
the slow step
the fast step
the first step
the second step
What order is the half life of Carbon14?
Zero
First
Second
1.What type of reaction is this?
3O2 + 2FeCl3 --> 2Fe2O3 + 3Cl2
Single Displacement
Decomposition
Double Displacement
Combustion
What is the unit for the rate constant (k) for 2nd order reactions?
s-1
M/s
M-1s-1
How does a catalyst speed up a reaction?
Adding more reactant
Lowering the activation energy
Increasing the activation energy
Increasing binding energy
___________ are produced in one step and used up in a later step and __________________ are present and unchanged in the reactants and the products
intermediates, catalysts
catalysts, intermediates
If a “reaction profile” has a taller ‘hill’ (or activation energy) then the reaction is ____________________?
Faster
Slower
What is the half life equation for a first order reaction?
.693/k
t-k
k/.693
rate = k[A]
What are the 2 characteristics that an effective collision must have? SELECT TWO
Enough energy to overcome Ea
Molecules in the correct orientations
High enough temperature
Apporpriate intermediates present
What is the rate law for the reaction with this slow elementary step? A + A --> B + B
rate = k[A]2
rate = k[B]2
rate = k[A][B]
rate = k[A]
What is the rate law for the reaction with this slow elementary step? A --> B + C
rate = k[A]2
rate = k[B]2
rate = k[A][B]
rate = k[A]
What is the rate law for the reaction with this slow elementary step? A + 2B --> D + C
rate = k[A]2
rate = k[A][B]2
rate = k[A][B]
rate = k[A]
What is NOT a way to speed up a reaction
Add a catalyst
Decrease the volume
Increase the concentration of reactants
Increase surface area of the solid
Decrease the pressure
Which curve represents the most particles in this Maxwell-Boltzmann curve (# of particles vs. speed)?
Black (peak on the left)
Red (peak in the middle)
Blue (peak on the right)
They all have the same number of particles
Which curve in this Maxwell-Boltzmann distribution represents the highest proportion of particles moving the fastest (# of particles vs. speed)?
Black (peak on the left)
Red (peak in the middle)
Blue (peak on the right)
All particles are moving at the same speed
Which curve in this Maxwell-Boltzmann distribution would represent the a gas with the highest molar mass?
Black (peak on the left)
Red (peak in the middle)
Blue (peak on the right)
What order of reaction has a half-life that does not change regardless of the initial concentration?
Zero
First
Second
Third
Losing electrons is ________________, gaining electrons is ________________
oxidation, reduction
reduction, oxidation
In an exothermic reaction, the sign of ΔH is ____ and the reaction feels ______
(-), hot
(+), hot
(-), cold
(+), cold
In an endothermic reaction, the sign of ΔH is ____ and the reaction feels ______
(-), hot
(+), hot
(-), cold
(+), cold
Freezing is an _________________________ process
Endothermic
Exothermic
Vaporizing is an _________________________ process
Endothermic
Exothermic
What are the coefficients?
1; 2; 1; 2
2; 1; 2; 1
4; 2; 1; 4
1; 4; 2; 2
Breaking bonds is _________________. Forming bonds is ______________________
endothermic, exothermic
exothermic, endothermic
ΔHrxn = ΔH_________________ − ΔH_________________
products, reactants
reactants, products
According to Hess' Law, if you double the coefficients of a reaction, ΔH will ________________________
Stay the same
Double
Quadruple
Halve
According to Hess' Law, if you reverse a reaction, ΔH will ________________________
Change signs
Double
Be inversed
Halve
_____ Hydrogen-Hydrogen single bond/s are broken and _____ Carbon-Hydrogen single bond/s formed
6; 8
2; 8
2; 10
6; 10
_____ Carbon-Carbon single bond/s are formed
6
2
3
10
Bond enthalpy is the amount of energy is takes to break __________ of a bond.
one mole
one gram
the activation energy
the binding energy
This reaction is ____________________ because energy is _____________
endothemic, absorbed
exothermic, released
endothermic, absorbed
endothermic, released
There are two Carbon(graphite) in the final equation. We should ________ the ΔH of the first sub-reaction.
Double
Halve
Take the inverse of
Reverse the sign of
We need to reverse one of the equations.
True
False
Heat is measure in K or °C
True
False
The particles under the purple curve (middle) have an average Kinetic Energy of 500K
True
False
The particles under the purple curve (middle) all have a temperature of 500K
True
False
What are the units of ΔHrxn?
kJ
J
kJ/mol
J/mol
