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Test your basic knowledge |
AP Chemistry
Start Test
Study First
Subjects
:
science
,
ap
,
chemistry
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Mole Fraction
Isotopes
entropy (S)
AH rxn = (Sum of AH of formation of products) - (Sum of AH of formation of reactants)
X of a = moles a/total moles
2. (organics) three carbons
titrant buret
prop-
0.512°C
Law of Definite Proportion
3. AH of formation for a substance in its stablest form (how it is found in nature)
0
Equivalence Point
Nodes
not spontaneous
4. If Q<Ksp
Dalton's Law of Partial Pressures
geometric isomers
no precipitate forms
high pressure - low temperature
5. OH¹?
Van't Hoff factor
hydroxide
paramagnetic
AE = q + w
6. Equation to find Ea from reaction rate constants at two different temperatures
ln (k1/k2) = (Ea/R)(1/T2-1/T1)
oxidizing agent
Increase Temperature
red
7. Oxoacid solution (such as HSO4-) forms...
oxide gas and water
Bond enthalpy
Chemical Kinetics
Law of Multiple Proportions
8. Color of Cs (flame test)
blue
Cg=kPg
Bond enthalpy
Constant Volume
9. Substances that form H+ when dissolved in water; proton donors
Acid + Base --> Salt + Water
Acids
v3kT/m
tetrahedral
10. How fast or slow a reaction occurs - becomes slower as it reaches equilibrium
-one
1) Assume percentages are g (where you have 100 g) 2) convert to moles 3) divide by lowest value 4) plug into compound
rate
# protons + # neutrons
11. Verticals on the periodic table
ammonium
hydro-ic acid
group
Chemical Kinetics
12. HF+ OH??H2O
Hydrogen bonding
2nd law of thermodynamics
weak acid strong base rxn
London dispersion forces
13. Solid to gas
sublimation
AE= AH - RTAn
cyanide
freezing
14. Mass percent
iodide
viscosity
-ous acid
g solute/g solvent x 100
15. If K>1 - then Gº<0 and reaction will be...at chemical equilibrium
spontaneous
Pressure
p
Bases
16. Boiling point elevation formula
Decrease Volume and Increase Temperature
AE= AH - RTAn
Quantum Model
?Tb= kb x molality
17. ln[A]=-kt + ln[A]0
Cg=kPg
Arrhenius acid
Integrated First-Order Rate Law
nitrite
18. Solution used in titration
Solution
titrant buret
Open System
strong acid strong base rxn
19. Group 1 - Ammonium - Nitrates - Acetates - Sulfates - Halides
soluble
s
Dalton's Law
Strong acid weak base rxn
20. In going from a particular set of reactants to a particular set of products - the change in enthalpy is the same whether the reaction takes place in one step or in a series of steps
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21. Energy involved in gaining an electron to become a negative ion
freezing
spontaneous
electron affinity
Metalliods
22. Henry's Law - solubility of gases is directly proportional to the partial pressure of the gas
Q>K
v3RT/M(in kg)
Ag+ - Pb2+ - Hg2+ - Sr2+ - Ca2+ - Ba2+
Cg=kPg
23. AX4E2
Valence Electrons(assigned)
Entropy (S)
square planar
Osmotic Pressure
24. An element with several different forms - each with different properties (i.e. graphite & diamond)
Density
Allotrope
second
alcohol
25. Measure of the average kinetic energy of all the particles in a substance
Temperature
Atomic Mass Unit
Dipole Moment
Work
26. Non-Ideal Gas Conditions
high pressure - low temperature
bromate
hydroxide
nitrate
27. IMF that occurs with FON
Hydrogen bonding
Adding
Buffer
allotrope
28. If a change is imposed on a system at equilibrium - the position of the equilibrium will shift in a direction that tends to reduce that change
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29. Molecules' tendency to stick to the container
adhesion
oxidation
Theory of Relativity
Chemical Bonds
30. (organics) four carbons
spontaneity
C=(mass)(specific heat)
tetrahedral
but-
31. The lowest energy configuration for an atom is the one having the max number of unpaired electrons allowed by the Pauli principle in a set of degenerate orbitals
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32. What is defined by you taken from the whole universe
red
System
sublimation
violet
33. Mol/L - concentration of a solution
Molarity
zero
v3RT/M(in kg)
spontaneous
34. How to Find an Empirical Formula Given Grams
1)Assign Oxidation #s 2) Half Reaction 3) Balance Moles 2) Balance add e- to balance Oxidation #s (RED-OX = reduction on left - Oxidation on right) 4) Add H+ or OH - to balance charge 5) Add H2O to balance hydrogens 4) Balance electrons by multiplyin
Overall Reaction Order
Enthalpy of Solution
1) Convert to moles 2) divide by lowest moles 3) if any halfs - double all values 4) plug into Compound
35. 1.Volume of individual particles can be assumed to be zero 2.The particles are in constant motion - which causes pressure 3.Particles exert no forces on each other 4.The average kinetic energy of the particles is directly affected by temperature(K)
chromate
Kinetic Molecular Theory - for ideal gases
Integrated Zero-Order Rate Law
m (third quantum number)
36. AX6
octahedral
oxide
Calorimetry
r1/r2
37. Delta H (AH) = ?
Open System
q/moles
nu
London Dispersion Forces
38. frequency symbol
Equilibrium constant
activated complex (transition state)
diamagnetic
nu
39. AX3
s orbitals
Pressure
triple point
trigonal planar
40. NO2¹?
l (second quantum number)
d
nitrite
hept-
41. AX2E - AX2E2
bent
Cell Potential (Ecell)
Alkaline earth metals
Ligand
42. Elements on staircase on periodic table
Amount of atoms present
adhesion
Metalliods
s orbitals
43. Energy can't be created nor destroyed
moles solute/kg solvent
Law of Conservation of Energy
0.0826Latm/Kmol
1) multiply each AMU by the percentage that represents that isotopes occurrence in nature 2) then add all the AMUs together.
44. Calculation from K to C
C + 273
0.512°C
melting
Isolated System
45. ClO2¹?
Temperature
chlorite
End Point
Isolated System
46. A homogeneous mixture with 1 phase
Density
Solution
Principal Quantum Number
l (second quantum number)
47. Connects the 2 half cells in a voltaic cell
Arrhenius acid
melting point
salt bridge
3/2RT
48. A solution that resists a change in pH - contains both a weak acid and its conjugate base
Buffer
triple point
amine
conjugate base
49. Group 2 metals
insoluble
1)Assign Oxidation #s 2) Half Reaction 3) Balance Moles 2) Balance add e- to balance Oxidation #s (RED-OX = reduction on left - Oxidation on right) 4) Add H+ or OH - to balance charge 5) Add H2O to balance hydrogens 4) Balance electrons by multiplyin
Alkaline earth metals
Molecular
50. Hydroxides are soluble or insoluble?
insoluble
effects of IMF
1atm=?mmHg/Torr
Limiting reactant