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The exam will cover material beginning with:

Chapter 21

21.4
Calculate K, ΔG and E^ocell from each other.

Calculate the potential of a concentration cell.

21.5 (no test questions on this section)

21.6 (no test questions on this section)

21.7

Predicting the products of electrolysis
Diagram an electrolysis cell
Apply the relationship between current, time and amount of substance

Chapter 22 will not be on the test.

Chapter 23

All sections are covered in this chapter.

Chapter 24

As mentioned in class – problems referencing p. 1076 will not be included.

24.3 (no test questions on this section)

24.6 (no test questions on this section)

Very little from 24.7 will be included but you need to know the basic difference between fusion and fission.

Sections not excluded above are included on this exam.

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I’ve posted a fourth practice exam under student resources/exams on my website that covers solution concentrations and colligative properties. There is also a key to this exam. Happy studying!

Solutions Quiz Key

1. Review section 4.2 Concentration Units: ppb, ppm, Molarity.

2. Review section 4.3 Dilutions: M1V1=M2V2

3. Review section 4.4 Electrolytes vs. Non-electrolytes

4. Study Figure 10.2 regarding sizes of ions.

5. Be able to put compounds and molecules in order of increasing intermolecular interactions: ion-ion, ion-dipole, H-bonds, dipole-dipole, dipole-induced dipole, dispersion

6. Related intermolecular forces to physical properties such as mp and bp.

7. Identify all the regions of the phase diagram.

8. Know more ways of expressing solution concentration: molality, percent by mass.

9. Be able to interconvert concentration units.

10. Carry out calucations for all colligative properties: vapor pressure lowering, boiling point elevation, freezing point depression, and osmotic pressure.

11. Use the van’t hoff factor correctly.

Solutions problems and collegative properties problems take lots of practice. I will be in my office tomorrow at 9:00 ready to solve problems for whomever arrives!

Determination of Molar Mass by Freezing Point Depression is now available on my website.

I’ve posted some new handouts to help you with the transition metal/coordination compounds topic. I’ve posted a reference guide for Inorganic Nomenclature. Also I would like you to read this article: A millennial overview of transition metal chemistry and answer the questions of this worksheet (answers are given at the end of the worksheet but please try to answer the questions on your own first!)

To prepare for the quiz on Thursday please make sure you can do the following:

1. Write electronic configurations for the first row of the transition metals

2. Give the MOST COMMON oxidation states for the first row of the transition metals.

3. Determine the oxidation state of a metal in a coordination compound.

4. Identify if a ligand is monodentate, bidentate or polydentate.

5. Apply the rules for nomenclature of coordination compounds to convert from formulas to names and names to formulas. (Do all the homework problems available on this topic – practice!)

6. Answer questions about periodic trends for transition metals. (section 23.1)

7. Determine if a tranistion metal is paramagnetic or diamagnetic.

8. Visually identify inorganic compounds on this page by color.

9. Answer questions about metallic behavior and reducing strength.

10. Discuss the toxicity of mercury.

The quiz covers the material in Chapter 23 from the beginning until the end of sample problem 23.3. It does not cover section 23.2. There is a lot of information in these few pages – so read them carefully and take notes!!

Exam Two

Chapter Six

All types of problems with PV=nRT and P₁V₁/T₁=P₂V₂/T₂

Problems about gas density and the relationship to molar mass.

Graham’s Law of effusion (relationship with rate of effusion and molar mass)

The general conditions required for ideal gas behavior.

Description of common gases (as listed on worksheet)

Chapter Seven

Frequency/Wavelength conversions

Identification of areas of the Electromagnetic Spectrum

Who’s who in atomic theory

Relationship between energy and wavelength/frequency

Three main experiments: Photoelectric Effect, Blackbody Radiation and Emission/Absorption Spectra

Quantum numbers and relationship to properties of orbitals (size, shape, orientation in space)

Aufbau principle (1s²2s²…)

Chapter Eight and Nine

Lewis dot structures

Periodic Properties: size and ionization energy

VSEPR Theory

Formal Charge

Shape and polarity of molecules

A special thanks to those students who stayed late yesterday to put in some extra time working on chemistry concepts. This opportunity will be repeated November 30th.

Due to a building evacuation (which was necessary according to protocol but which was precipitated by a hoax) we had to cancel our class. I will make the necessary adjustments to the syllabus and post the changes sometime this evening. In the meantime please enjoy your halloween holiday and study for the quiz – which will be given on Wednesday. The building is open now and all classes are proceeding as scheduled.

I’ve posted a quiz. It covers the entire chapter so some questions would best be considered after the exam – ones related to Gibb’s Free Energy, Equilibrium, etc. Anyway, here is the link:

Electrochemistry Practice Quiz

I haven’t posted the answers yet. Email me if you have questions you are not sure how to answer.

The quiz on Wednesday will conver periodic trends and Lewis Dot Structures. Know about atomic and ion size trends so that you can put atoms/ions in order by size. Know about ionization energy trends. Know how to write Lewis Dot Structures.

This homework sheet is very important! Be sure to go over it. http://justonly.com/chemistry/chem201/students/handouts/lewis_practice01.pdf

I’ve created a new handout summarizing the rules for assigning oxidation numbers to the atoms in chemical compounds. Chemistry 203 students should use this for review. It will be very important to have the rules memorized before beginning electrochemistry.

I’ve created a new video from problem number nine on the last quiz. In this video I work out a problem involving Ksp. Here are the relevant links:

Video Library

Part One Ksp

Part Two Ksp

I am posting this message to let you know I will be in my office Monday morning – but there won’t be a scheduled study group. You are welcome to come on by if you have any questions – I’ll be working on grading and the usual organizing of paperwork. Lab notebooks are due on Monday so if you have any questions about your notebooks that  would be another reason to drop by and see me. Enjoy your weekend and think about chemistry!

And please enjoy this phenomenal gallery: http://www.asylumresearch.com/Gallery/Gallery.shtml

A problem solving session for thermodynamics problems will take place in my office from 9:00 a.m. to 11:00 a.m. on Wednesday, October 19th for Chem 203 students. All are invited.

If you are still trying to wrap your thoughts around the first and second laws of thermodynamics – try watching this puppet show.