AP Final Review
Jan 03, 2016
AP Final Review
Drill: Give the EC, EDD, OX #, & QN
for elements:12, 34, 41, & 67
Review Chapters 8 & 9 in the Kaplan
AP CHM Book.
Drill: Calculate the %
composition of:CaCO3 & H3PO3
AP CHM HW•A problem is already on the Poly website.
Review Chapters 4 & 5 in the Kaplan
AP CHM Book.
Drill: When 17.4 g of K2SO4 was added to 250
mL of 0.50 M BaCl2, 21.0 g of solid product is
formed. Calculate the molarity of Ba+2 ions in the resulting solution.
Qualitative Analysis
PresentationHand-Out
Neuro-transmitter
Presentation
AP CHM HW•A problem is already on the Poly website.
Drill: Hocombustion for C4H10
is -1284 kJ/mole. Calculate the heat change
when 8310 mL CO2 is collected at 25oC under 89.4 kPa when burning
C4H10.
When 25 g of CaCO3 was formed when 750 mL of
0.50 M CaCl2 was combined with ex K2CO3.
Calculate the % yield.
Calculate the volume of chlorine gas collected at
27oC under 83.1 kPa when excess fluorine gas is
bubbled through 250 mL of 0.50 M NaCl.
AP CHM HW•A problem is already on the Poly website.
Drill: Determine the chemical formula of a compound containing
28 % iron, 24 % sulfur, & 48 %
oxygen.
Draw ECs, EDDs, QNs, & possible ox
#s for:
Mg Br Mn
Calculate the number of oxygen atoms in 16 g of
Fe2(SO4)3
Quiz Tomorrow
Drill: Calculate the maximum number of
sulfur dioxide molecules that could be produced
through the decomposition of 16 g of Fe2(SO4)3
AP CHM HW•A problem is already on the website
7) An environmental concern is the depletion of O3 in the Earth's upper atmosphere, where O3 in normally in equilibrium with O2 & O. A proposed reaction mechanism for this depletion is in the box.
Step I: O3 + Cl O2 + ClOStep II: ClO + O Cl +O2
a)Write the balanced equation for the overall reaction represented by
steps I & II above.b) Clearly identify the catalyst in the
mechanism above. Justify your answer.
c) Clearly identify the intermediate in the mechanism above. Justify your answer.
d) The rate law for the overall reaction was found to be rate = k[O3][Cl]. Determine the following:
i) The overall reaction orderii) The appropriate units for the rate constant, k.iii) The rate determining step in the reaction mechanism. Justify your answer
Week’s Schedule• Review & Quiz Tomorrow on
Stoichiometry
• Review Reactions on Wednesday
• Quiz on Reactions on Thursday
• AP Test on Friday
Problem session•Problems: 10
•From the Final Review
Problem session•Problems: 11
•From the Final Review
Problem session•Problems: 12
•From the Final Review
Problem session•Problems: 35
•From the Final Review
Problem session•Problems: 40
•From the Final Review
Drill: Determine the empirical formula for
a compound containing: 60.0 % C, 8.00 % H,
& 32.0 % O.
Calculate the volume of 2.0 moles of gas
under 83.1 kPa pressure at 127oC:
Calculate the molecular mass of
5.0 g of gas in 831 mL under 250
kPa at 227oC
Calculate the volume of NO2 produced at 27oC
under 83.1 kPa when 6.4 mg N2H4 react with excess oxygen gas
forming NO2 & H2O.
When XS HCl is added to 10.0 g of impure CaCO3, 831 mL CO2 was collected at 27oC under 150 kPa pressure. Determine:
a) balanced rxn.
b) moles CaCO3 in sample.
c) % CaCO3 in sample.
AP Chm HW•Study for a quiz tomorrow on Gas Laws & a complete AP problem portion test on Friday
Work problem
Drill: When XS HI is added to 16.2 g of impure Ca(HCO3)2, 831 mL CO2 was collected at 27oC under 450 kPa pressure. Determine:
a) balanced rxn.
b) moles Ca(HCO3)2 in sample.
c) % Ca(HCO3)2 in sample.
AP CHM HW•A problem 2003.1 is on the website
Drill: List & describe 4 types of intermolecular or Van der Waals
forces:
AP CHM HW•A problem 2003.2 is on the website
Drill: Calculate the molarity, molality, & mole fraction of a 1.005 g/mL
solution containing3.00 g of CH3COOH in
17.1 g of water.
AP CHM HW•A problem 2003.3 is on the website
Drill: A particular reaction releases 60.0 kJ of
heat and gains 77.0 J/K entropy at 27oC. Calculate
the value of the equilibrium constant for
that reaction at 27oC.
Test Tomorrow
Chemical Reactions•Classify, predict, balance, & write the net ionic reaction for each of the following:
Solutions of zinc(II) sulfate and sodium
phosphate are mixed.
Solutions of silver(I)nitrate and lithium bromide are
mixed.
Solid potassiumis added to asolution of
Copper(II)nitrate.
Aqueous hydrochloric acid is added to a solution
of potassium hydroxide.
Aqueous Acetic acid is added to a
solution of potassium hydroxide.
Equimolar portions of hydrochloric
acid & potassium sulfite are combined.
Excess hydrochloric acid is added to a
solution of potassium sulfite.
Drill: Excess nitric acid is added to a
solution of sodium carbonate.
Drill: Classify, predict products, & balance the
following rxn:
• Solid potassium hydroxide is added to aqueous copper(II)nitrate.
Solid sodium oxide is added to
water.
Aqueous ammonia is added to a solution of
iron(III)chloride
Samples of boron trichloride and
ammonia gas are mixed.
Carbon disulfide vapor is burned in
excess oxygen.
Solid zinc is added to aqueous silver(I) nitrate.
Solid barium carbonate is
heated.
Solid sodium bicarbonate is
heated.
A solution of tin(II)chloride is
added to an acidified solution of potassium
dichromate.
Aqueous ammonia or potassium
thiocyanate is added to a solution of
copper(II)chloride
Sulfur dioxide gas is bubbled through water
Propanol is burned in excess
oxygen.
Drill: Classify, predict products, balance, give
net ionic, & name:•Solid calcium bicarbonate is placed in 1.0 M acetic acid
Review HW
Students work AP Reactions
Sheet
Review the rxns
worksheet
Predicting products of chm
rxn quiz tomorrow
Quiz on predicting products of
chemical reactions followed by quiz
review.
Gas Laws
P1V1/T1 = P2V2/T2
PV = nRT
PT = P1 + P2 + etc
v1 MW2
v2 MW1
=
A gas occupies 5.0 L. When the absolute
temperature is doubled & the pressure is reduced by
a factor of 3, the new volume is _____.
Calculate the pressure of 2.00
moles of gas occupying 831 mL
at 127oC.
Calculate the mass of 831 L of
CO2 at 167oC under 150 kPa
pressure:
Calculate the molecular mass of 25 g of gas
occupying 125 mL at-23oC under 5.0 atm of
pressure.
Calculate the velocity ratio of Helium gas vs
sulfur dioxide gas.
Calculate the volume of oxygen gas at
227oC under 0.821 atm pressure required
to burn 15.0 g of acetic acid.
AP CHM HW•Problems: 10 & 13
•From the Final Review
Continue on the Midterm
Review
AP CHM HW•Problems: 22
•From the Final Review
Continue on the Midterm
Review
Drill: List & describe 4 types of intermolecular or Van der Waals
forces:
Predict MP trend for:•Any metal column
•Any nonmetal column
•Columns of corresponding salts
AP CHM HW•Study for the Semester Final
Drill: Draw LDDs for:
XeCl4 CCl4
SCl4 PCl5
SCl6 ICl3
M combines with O making MO.
X combines with K making K3X.
Determine subscripts for MaXb:
The following is 47 % O
HClO HClO2
HClO3HClO4
Determine % composition of all
elements in Fe2(SO4)3
Ore Emp % by mass # Form Cu S Fe 1 Cu2S ? ? 0 2 ? 34.6 34.9 30.5 3 ? 55.6 28.1 16.3
A B: K1 = 2.0 x 10-4
2 A 2 B: K2 = ? 3 A 3 B: K3 = ?
B A: K4 = ? 1/2 A 1/2 B: K5 = ?
Drill: Hrxn = -1500 kJ
Srxn = +300 J/K
Calculate Teq:
Calculate the mass of CaSO4 produced when
11.1 g CaCl2 react with 250 mL 0.50 M
H2SO4.
In the thermite rxn, 5.1 g of Al2O3 was
produced when 16 g Fe2O3 react with xs
aluminum. Calculate % yield.
Calculate the mass of solid produced when
11.1 g CaCl2 react with 250 mL 0.50 M
Pb(NO3)2.
Solve Rate ExpressionA + B C + D fast
4C + A 2G fast
4D + B 2K fast
G + K Q + W slow
Q + W Prod. fast
CxHy is burned in air producing 8.96 L CO2 at STP & 5.4 g of H2O. Calculate: EF of CxHy
Experimental ResultsExp # T [A] [B] Rate
1) 27oC 0.10 0.10 2
2) 27oC 0.30 0.10 18
3) 27oC 0.10 0.20 4
4) 77oC 0.10 0.10 20
Calculate H, G, & S in the production of 831mL ammonia at 227
oC under
250.0 kPa pressureCompd NH3
Hfo -46.1
Gfo -16.5
CxHy is burned in air producing 4.48 L CO2 at STP & 5.4 g of H2O. b) Calculate the MF if
CxHy gas occupied 2.24 L at STP.
CxHy is burned in air producing 4.48 L CO2 at STP & 5.4 g of H2O. c) Write the balanced rxn
for the combustion reaction.
CxHy is burned in air producing 4.48 L CO2 at STP & 5.4 g of H2O. d) What was the mass
of CxHy burned?
Drill: Draw LDDs for:
SO2 HNO2
HNO3 C6H6
Calculate the molecular mass of a
40 % solution of molecular solute in water that boils at
101.024oC
30 g C3H6NF was dissolved in 50 g
C6H12O at 27oC making a 0.800 g/mL solution. Calculate X, mo, M, ,
VP, BP, & FP.
Lab Results: Cup H2O NaOH Thermo
5.0 g 50.0 g 4.0 g 15.0 g Ti = 22.0
oC Tf = 27.0
oC
Cmpd NaOH Na+ OH-
Hf
o -425.6 -240.1 -230.0
Determine: theoretical and experimental heat changes
When 2.00 g NaOH dissolves in a 1.0 L water in a 2.5 kg calorimeter, the temp. went
from 22.5oC to 26.5oC. Calculate: Ho
soln Cwater = 4.18 J/gK Ccal = 2.00 J/gK
Lab Results: Cal H2O KOH 1500 g 750 g 25.0 g Ti = 22.0
oC Tf = 26.0
oC
Cmpd KOH K+ OH-
Hf
o -424.7 -246.1 -230.0
Determine: theoretical and experimental heat changes
Lab Results: Cal H2O KOH 1500 g 750 g 25.0 g Ti = 22.0
oC Tf = 26.0
oC
Cmpd KOH K+ OH-
Hf
o -424.7 -246.1 -230.0
Determine: theoretical and experimental heat changes
1A + 1B 1C + 1DCalculate the equilibrium
concentrations of each species when 2.0 M A is
mixed with 3.0 M B.Kc = 0.25
1A + 1B 1C + 1DCalculate the equilibrium
concentrations of each species when 150 ml 2.0 M A is mixed with 100.0
ml 2.0 M B. Kc = 0.25
Calculate [H+],[OH-], pH, & pOH of 0.010 M HC7H5O2 (HBz)
Ka = 6.4 x 10-5
Calculate the Ka of 0.20 M Hquack
when it ionized 5.0 % in an aqueous
solution.
The pH of a 0.79 M solution of Hnut is 3.10.
Calculate its Ka
Calculate [H2CO3], [HCO3
-], [CO3-2], [H+],
[OH-], & pH of 0.44 M H2CO3 Ka1 = 4.4 x 10-7
Ka2 = 4.7 x 10-11
Calculate [H+],[OH-], pH, & pOH of 0.10 M HC7H5O2 (HBz)
in 0.20 M KBzKa = 6.4 x 10-5
Drill:Calculate the pH of 0.10 M HF:Ka = 4.0 x 10-4
Calculate [H+],[OH-], pH, & pOH of 0.10
M HFin 0.20 M KFKa = 4.0 x 10-4
Calculate [H+],[OH-], pH, & pOH of 0.20
M KFKa = 4.0 x 10-4
Calculate the solubility of MX(s)
Ksp MX = 2.5 x 10-9
Calculate the solubility of MX2
Ksp = 3.2 x 10-11
MNO3 is added to a solution of 0.10 M KX
& 0.10 M K2Y.Ksp MX = 3.6 x 10-7
Ksp M2Y = 2.5 x 10-11
Calculate the solubility of MX2
in 1.0 M M(NO3)2 Ksp = 3.6 x 10-11
Drill: Describe the lab to
determine rxn rate expression.
Describe the lab to determine the molarity of an
acid.
Describe the lab to determine % yield of heat of
rxn.
Drill: Determine all when a cell with an Al electrode in AlCl3(aq) is connected to a cell with
a Zn electrode in
ZnBr2(aq)
Determine the rxn that takes place when
electricity is passed through two Pt
electrodes in CdCl2(aq)
• Determine the voltage of a cell with a copper
electrode in 0.10 M CuNO3 & a zinc
electrode in 1.0 M
Zn(NO3)2 at 27oC
Calculate the years required to plate 216 kg onto the cathode when a 96.5 mAmp current is applied to a solution of
AgNO3
Drill: List & describe all of the
radioactive particles.
Determine Products:1) emission of Ra-226 2) emission of Ba-139
A sample diminishes from 0.500 % C-14 to
0.00300 % C-14 in _____ years
List & describe the 10 organic prefixes dealing with carbon
chain length.
Name & draw all organic functional groups containing
either oxygen and/or nitrogen.
A compound is66.5 % C, 9.44 % H, & the rest is O.
Determine its empirical formula.