Solubility Product and Solubility

Aqueous Systems Overview

Today was a bit overwhelming - an introduction to the entire Aqueous Systems unit:

Electrolysis

This is the last concept we need to learn about in this topic. It is the opposite to the theory of cells in every way except one:

Oxidation occurs at the Anode

Reduction occurs at the Cathode

Electrochemical Cells

Today we made a Zinc-Copper cell and measured its voltage. We then put a group of them in series to amplify the voltage - this is called a battery.

There is a convention for how we write a "cell diagram" for this, and we will explore that more next week.

Standard electrode potentials are measured by setting up the hydrogen half-cell as the anode. The redox pair that you want to know the electrode potential for is then set up as the cathode, and the voltage recorded - this is the electrode potential for this particular redox pair.

Standard Electrode Potential

Oxidation-Reduction

Today we recalled the work we had done on: oxidants and reductants; observations and half equations; and oxidation numbers:

Entropy

This video sums it up very nicely:

It is worthwhile knowing the sorts of questions we may be asked about entropy as well:

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