More random facts. 1. Organic amines like methylamine, CH3NH2, are weak bases since the lone pair on the N atom can accept H+. 2. Nickel (II) salts are green. 3. Positive Ecell values go with negative Delta G values and very large K values. 4. When [H+] in solution is < [OH-] the solution is [...]
Random facts. 1. The speed of a chemical reaction is not related to the equilibrium position. 2. Hydrogen bonding is an INTERmolecular force, not an INTRAmolecular bond. 3. Electrolysis is only necessary when a reaction is non-spontaneous with a positive Delta G. 4. Rutherford’s Gold Foil Experiment produced evidence of a dense, positively charged nucleus. [...]
This is the second in the series (the first is here) of short blog posts on the new content (as I currently see it) of the 2013-14 AP Chemistry Curriculum. Mass Spectrometry (at this level) is something that I know a little bit about. Now, although that statement in and of itself is accurate, like [...]
Following my summary of the new, exclusion statements, this is the first in a series of short blog posts that I intend to write about each of the additions to the new, AP chemistry curriculum. Keep coming back for more as the series progresses. First up, Photoelectron Spectroscopy (PES). OK, I don’t really understand the [...]
The TOPIC 9 notes have been updated in the relevant subscriber areas.
I am now getting into the nitty-gritty of the new framework as I prepare my materials for a huge overhaul and re-write. In general, exclusion statements are incredibly useful, and frankly should ALWAYS have been in the course description, BUT until we see further sample questions, and/or we have a history of the new exam, [...]
A student asked me today (thanks, Austin) why there are two different expressions given on the AP exam for calculating the root mean square speed of a gas, and how this can be explained in terms of the use of k, R, m and M. Here’s the answer that I gave. You will find two [...]