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

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.

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

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:

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.

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


Continue on the Midterm

Review

AP CHM HW•Problems: 22


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

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.

AP Final Review

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