Mr. Liberman started off class today by first reviewing the rules of solubility and insolubility. First off, we restated what those words mean: something is soluble if it is able to dissolve in water, and something is insoluble if a precipitate forms in water. Then Mr. Lieberman explained that the lab that we did yesterday was the basis on which we were eventually going to base the solubility of certain compounds off of. This will include compounds that are commonly found around us and whether they are soluble or not, but it is not that black and white. There are some compounds such as silicate (SiO3) that is insoluble unless it contains the ions of K+ and Na+. There are many more examples like this.
To make things more interesting, Mr. Lieberman did the Lead Iodide experiment to show that certain compounds are always soluble (NO3), and therefore, you are able to identify the solids in a reaction. See Video Below:
This reaction is of Lead and Iodine. This solid had to form between these two elements because NO3(nitrate) mixed with any other element is soluble.
Since Lieberman was in a good mood, after explaining all of this, he let us work on the lab and the worksheets we got. Everybody was working until the bell rang and class ended. That was it for the day. The next scribe is....
Kaitlin S.
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