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Honors Chemistry

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Study Guide

Here are some suggestions for studying. Check back here again. I may add some ideas as late as Sunday Morning.

There will be no specific questions dealing with things like Redox balance or quantum. But, you should know how to balance a simple reaction and stoichiometry will certainly be involved.
Most of the questions will focus on equilibrium topics. But, you should review how a catalyst works and some basic kinetics. For example, you won't be asked to determine reaction order from data, but you should know what reaction order means…what's implied by a second order reaction versus a first, for example.
None of the "facts" we have covered about biological systems will be tested directly. But, you could see a question about a reaction that involves a biological molecule.
You will not be required to solve multiple equilibrium systems except a weak acid or base. But, you should be able to predict how two equilibria can affect each other.
Such as if A + 2B AB2 is at equilibrium and I add "C," given that A + 2C AC2, what will happen to the first equilibrium?
You should definitely be able to solve weak acid and base problems involving a Ka or Kb and also converting between pH and concentrations of either OH- or H3O+. You should be able to use Kw including if it is changed by temperature.
More to come?

Kinetics Pogil Answers

Pogil Answers.

Here is a link to the answer keys for the Pogil activities. First one is ready now.
First Pogil Answers. Note that the answers should be good…but, if you have different answers, don't be concerned. I make mistakes.
Here is the second one.

Also, here are some reaction mechanism problems:

Below is an overall reaction and a proposed reaction mechanism:

2NO2Cl(g) 2NO2(g) + Cl2(g)

  1. NO2Cl NO2 + Cl (slow)
  2. NO2Cl + Cl NO2 + Cl2 (fast)

Assuming the reaction mechanism above is correct
  1. What is the rate determining step?
  2. What should be the rate law for the overall reaction?
  3. What reaction intermediate is present?

Answers below:

The rate determining (limiting) step is the first one. That is, the slow one.
The rate law should be Rate=k[NO2Cl]
The reaction intermediate is Cl a chlorine atom.


Intro Kinetics

Introduction to Kinetics.
Some reactions are slow (oxidation of iron in air to make rust), some very fast (oxidation of C4 explosives).
Oxidation of sugar releases more energy than oxidation of the same mass of TNT…yet, burning sugar does not release energy fast enough to explode.
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