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WorksheetsQuizizz Review #4 AP Chemistry
Total questions: 73
Worksheet time: 2hrs 50mins
What type of alloy is made when the radii of the atoms are similar in size?
interstitial
substitutional
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
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
What is the total # of covalent bonds carbon can form when drawing a Lewis structure?
12
6
4
8
What is the bond angle in BF3?
90
120
109.5
180
What is the bond angle in H2O?
120
90
180
104.5
Are asymmetrical molecules polar or nonpolar?
Polar
non-polar
neither
What is the bond angle in NH3
120
107.3
180
90
What is the hybridization of carbon in CH4?
sp3
sp
sp2
What is the hybridization for carbon in CO2
sp3
sp
sp2
Count the number of sigma and pi bonds in this molecule:
13 sigma, 1 pi
14 sigma, 2 pi
1 sigma, 14 pi
2 sigma, 13 pi
Why are asymmetrical molecules polar?
Their dipoles do not cancel
Their dipoles cancel
What is the hybridization for an oxygen in CO2
sp3
sp
sp2
When a molecular solid melts or boils, which breaks?
Intermolecular forces
Intramolecular bonds
What is the total # of covalent bonds carbon has to make when drawing a Lewis structure?
12
6
4
8
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
What is the formula for calculating % yield?
actual/theoretical *100
theoretical/actual *100
1.What type of reaction is this?
3O2 + 2FeCl3 --> 2Fe2O3 + 3Cl2
Single Displacement
Decomposition
Double Displacement
Combustion
What formula do we use for dilution calculations?
M1V1=M2V2
D=m/V
V1=M2
Total Volume/Partial Volume
Acids
donate electrons
donate protons
accept protons
donate protons
Bases
donate electrons
accept electrons
donate protons
accept protons
Combustion reactions produce what two substances?
Water Vapor and Carbon Dioxide
Carbon Dioxide and Oxygen
Oxygen and Water Vapor
Losing electrons is ________________, gaining electrons is ________________
oxidation, reduction
reduction, oxidation
What is the oxidation number of N in NO21-?
0
-1
2
3
What is the oxidation number of P in PO43-?
0
4
5
-2
Chose the salts that are soluble:
sodium
potassium
nitrates
ammonium
The ______ the acid, the ______ its conjugate base.
stronger, weaker
stronger, stronger
Chromatography separates mixtures based on what property?
particle size
intermolecular forces
boiling points
state of matter
In paper chromatography, if water is the mobile phase, what kind of substance will move up the farthest?
polar substance
non polar substance
Distillation separates mixtures based on differences in what property?
Solubility
Boiling Point
Particle Size
State of Matter
List the 4 Intermolecular forces from weakest to strongest
hydrogen bonding, ion-dipole, london dispersion, dipole dipole
london dispersion, hydrogen bonding, ion-dipole, dipole dipole
london dispersion, dipole dipole, hydrogen bonding, ion-dipole
dipole dipole, hydrogen bonding, ion-dipole, london dispersion
“More polarizable” refers to which Intermolecular Force?
hydrogen bonding
london dispersion
dipole dipole
List ALL the Intermolecular forces that exist in PCl3
hydrogen bonding, london dispersion
london dispersion, hydrogen bonding, dipole dipole
london dispersion, dipole dipole
london dispersion
The dashed line is a representation of a hydrogen bond.
True
False
The dotted line is a representation of a hydrogen bond.
True
False
Name a property that decreases as Intermolecular Forces increase.
Vapor pressure
Conductivity
Melting point
Solubility
Name a property that increases as Intermolecular Forces increase.
Vapor pressure
Conductivity
Melting point
Solubility
What type of solid will not conduct electricity until it is liquid or aqueous?
Ionic Solid
Covalent Network Solid
Molecular Solid
Metallic Solid
What is an example of a covalent network solid?
Salt
Diamond
Sugar
Water
What type of solid always conducts electricity?
Ionic Solid
Metallic Solid
Covalent Network Solid
Molecular Solid
When a molecular solid melts or boils, which bonds break?
Intermolecular
Intramolecular
What type of alloy is this?
Interstitial
Substitutional
What type of alloy is made when the radii of one element are similar in size with the other element making up the alloy?
interstitial
substitutional
What causes gas pressure?
large space between the molecules
random motion of particles
collisions with the walls of the container
P and V are ___________________ related?
inversely
directly
The more molar mass a gas has, the_________________ it moves
faster
slower
Average Kinetic Energy is another term for _____________.
Heat
Temperature
Pressure
Activation energy
Real gases behave most like an ideal gas at what conditions of temperature and pressure?
High T, Low P
High P, Low T
High V, Low T
At equilibrium, rates of the forward and reverse reaction are...
The same
Not the same
A system at equilibrium
Must have reactants and products
Must have products only
Must have reactants only
At equilibrium, concentrations of reactants and products are
equal
constant
At what time does the system first reach equilibrium?
24s
40s
60s
80s
The equilibrium constant expression, Kc, given aA + bB ⇄ cC + dD, is...
Kc = [A]a[B]b[C]c[D]d
Kc = [C]c[D]d[A]a[B]b
Which substance(s) would not be included in a equilibrium constant expression?
NaCl(s)
NaCl(aq)
NaCl(l)
NaCl(g)
If a K value is greater than 1,
more products are present at equilibrium
more reactants are present at equilibrium
If a K value is VERY large,
the reaction has essentially gone to completion
there are more reactants present at equilibrium
If K < Q, the reaction will proceed in the...
reverse direction to reach equilibrium
forward direction to reach equilibrium
When a reaction at equilibrium is reversed,
the K value's sign is flipped
the K value is divided by 2
the K value is inverted
To calculate the K of an overall reaction from individual reaction K values, the individual K values are
added
subtracted
multiplied
divided
When the coefficient of a reaction is multiplied by a factor x,
the K value is multipled by x
the K value is divided by x
the K value is raised to the power x
Given the following equilibrium equation,
A (g) + 2B (g) ⇄ AB2 (g) ΔH > 0, which of the following changes will increase the amount of AB2 in the vessel?
Decreasing the temperature
Increasing the concentration of A
Removing a small amount of B
Decreasing the pressure
Given the following equilibrium equation,
A (g) + 2B (g) ⇄ AB2 (g) ΔH < 0, which of the following changes will decrease the amount of AB2 in the vessel?
Increasing the temperature
Increasing the concentration of A
Increasing the pressure
Adding a catalyst
The following system at equilibrium is exothermic. If the temperature is increased...
A (g) + 2B (g) ⇄ AB2 (g)
[A] will increase the most
[B] will increase the most
[AB2] will increase the most
For an exothermic system at equilibrium, if the temperature is increased, the equilibrium will shift towards the...
reactants
products
For an endothermic system at equilibrium, if the temperature is decreased, the equilibrium will shift towards the...
reactants
products
In a Ksp expression, we always assume that the reactant is made up of
the solid precipitate
the aqueous ions
If Ksp >1, we say the salt is...
soluble
insoluble
If a common ion is present, the solubility of a salt
is increased
is decreased
will remain the same
