I started lecture discussing the Applied Qualitative Analysis Lab and went into detail about the qualitative analysis schemes used to isolate and identify metal cations in solution. We separate cations into groups based on their solubility characteristics.
Applied Qualitative Analysis Scheme
Once the groups are separated, a flow chart is used to organize the separations within each group.
Group I Separations
We are trying to emphasize they reasons why we use certain chemicals and which concentrations are best used to facilitate the separations.
Why does our HCl need to be cold and dilute?
In the qualitative analysis experiment you will need to isolate and identify various cations in solution. The Group I isolation and confirmations are discussed in detail.
Group I Analysis
When you are performing each step in the lab, be sure to consider how the common ion effect, the pH of the solution, complex ion formation, and amphoteric effects influence the solubility.
With the lectures notes from today you should be able to complete the following problems:
Qualitative Analysis of Metal Cations
Questions 19-23 from the Solubility homework set posted on Carmen
*Solubility Quiz Question #14
*Solubility Quiz Question #15
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