AP Chemistry Unit 3/4 Review

IMF

100

List all the IMFs between two HF molecules.

Hydrogen Bond

LDF

200

Which molecule would have the higher boiling point and why: NH₃ or CH₄? List all the IMFs between these molecule

NH₃  :   H-Bond , LDF

CH₄   :   LDF

300

You have two sealed jars. One has liquid Br₂ and the other has liquid H₂O. Which jar would you expect to have a higher vapor pressure after 10 minutes and why?

Br₂

400

Ethyl Acetate & Butyl Acetate.

Which chemical has a higher boiling point?

(Slide #1 for diagram)

Butyl Acetate

(Stronger LDF)

Ideal Gas Law(3.4-3.6)

100

A flask contains 0.50 mole of O_2(g), 0.20 mole of CO_2(g), and 0.30 mole of Cl_2(g). The total pressure of the gases in the flask is 5 atm. What is the partial pressure of the Cl_2(g) in the flask?

1.5 atm

200

Under what conditions of temperature and pressure will H₂ gas be expected to behave most like an ideal gas?

(High/low) Temp.

(High/low) Pressure

High Temp.

Low Pressure.

300

Sketch a Maxwell-Boltzmann Curve of Helium (He) and Argon (Ar) gas on the same graph

See whiteboard

400

A sample of CO₂(g) is stored in a rigid 3.00 L container at 10 atm and 298 K. The gas is cooled to 250 K. Calculate the new pressure: 

(Assuming Ideal Gas)

8.39 atm

Molarity & Photoelectric Effect(3.7-3.8 , 3.11-3.13)

100

A Beer's law graph is created after the concentration lab. What is the unknown concentration of the solution with the absorbance = 0.9

(See slides)

900 micromolar

200

A student prepares a solution by dissolving 80.00 g of NaOH (molar mass 40.0 g/mol) in enough distilled water

to make 100.0 mL of solution. The molarity of the solution should be reported as

20 M

300

A minimum amount of energy required to break a C-C bond is 150 (KJ/mol) . Does a photon with a frequency of 1.00 x 10¹² s^-1 have enough energy to break this bond? Show your calculation.

See Whiteboard

400

A 0.10 mol sample of AlBr₃(s) and a 0.20 mol sample of NaBr(s) are dissolved in water and diluted to 200 mL.

What is the [Br^-] in the diluted solution?

2.5M

Stoichiometry(4.5)

100

H₂ + Cl₂ → 2 HCl

In the reaction represented above, what moles of H₂ is needed to produce 10 moles of HCl with excess H₂ ? (Assume the reaction goes to completion.)

5 moles

200

H₂ + Cl₂ → 2 HCl

In the reaction represented above, what mass of Cl₂ is needed to produce 73 g of HCl (36.5g/mol) with excess H₂ ? (Assume the reaction goes to completion.)

71 g

300

C₃H_8(g) + 5 O_2(g) → 3 CO_2(g) + 4 H₂O_(g)

What volume of O₂ is required to react with excess C₃H₈ to produce 67.2 L of CO_2(g)? (Assume all gases are at STP)

112 L

400

For the combustion of sucrose: 

C₁₂H₂₂O₁₁ + 12 O₂ → 12 CO₂ + 11 H₂O

If 10.0 g of sucrose _{(342.3 g/mol)} and 10.0 g of oxygen gas _{(32 g/mol)} react, how many grams of  CO₂ can be produced? 

13.75 g

500

3 Ag_(s) + 4 HNO₃ → 3 AgNO₃ + NO_(g) + 2 H₂O

The reaction of silver metal and dilute nitric acid proceeds according to the equation above. If 0.30 mole of powdered silver is added to 20. mL of 12M nitric acid, the number of liters (L) of NO gas that can be formed is ?  _{(Under STP)}

1.344 L

Surprise!

100

Mr. Shih and Renee are from the following country.

BONUS STAMP: Renee plays the following sport originating from Taiwan.

Taiwan 

(If your answer is China -1000000pts on test)

BONUS: Dragonboating

200

Which molecule include Dipole-Dipole force?

A) CCl₄

B) CHCl₃

c) Br₂

(B)

300

Write the Net Ionic Equation of the following equation:

SrBr_{2 (aq)} + K₂SO_{4 (aq)} -> SrSO_{4 (s)} + 2 KBr _(aq)

Sr²⁺_(aq)   +   SO₄^2- _(aq) -> SrSO_{4 (s)}

400

Which molecule is most likely to dissolve in water?

A) CCl₄

B) CHCl₃

c) Br₂

(B)

500

Balance the equation:

KNO₃ + C₁₂H₂₂O₁₁ -> N₂ + CO₂ + H₂0 + K₂CO₃

48KNO₃ + 5C₁₂H₂₂O₁₁ -> 24N₂ + 36CO₂ + 55H₂0 + 24K₂CO₃