What have I learned lately?
I have learned about hybridization, I have leanred more specific qualities and properties of the three main types of compounds (ionic, covalent and metallic).
What have I done lately?
I have gotten sick and taken notes. My life is just flush with activity.
What do I hope to do?
Finish getting caught up on things i missed due to my wisdom teeth. Find time to just marinate in laziness. Take up scuba diving. Introduce folk dance to the community. And pass the test coming up on Monday so that I can keep my grade at at least a C so come April I can go to a Cage the Elephant concert.
Friday, February 21, 2014
Monday, February 17, 2014
Classification of solids
...Labs are fun!
Anyway, the most recent lab, Classification of Solids, meant burning innocent test tubes- I mean melting the substances inside the test tubes!- seeing if they were soluble, and seeing if they could conduct electricity. The questions related to this lab were mostly interpreting the results and actual questions relating to the knowledge acquired during the lab.
I suppose I should answer those.
An ionic solid would be soluble in water and conduct electricity in the melt, a network solid would be soluble in organic solvents, a metal would conduct electricity when under pressure (or at just about any other time), and a molecular solid would be slightly soluble in water and slightly conductive in said solution. If a solid was white at room temp, melted at 80 degrees Celsius and the melt had slight electrical conductivity it would be an ionic solid because it is presumably crystalline and conducts electricity. If a white solid melted at 1000 degrees Celsius and was insoluble in all solvents, and didn't conduct electricity at all, it would be an inorganic network solid. Potassium is a metal, Calcium Carbonate is an inorganic network solid, Octane is a molecular solid, and Hydrogen Chloride is a molecular solid as well. Speaking generally, metals are insoluble in water, network solids are ductile and malleable, and about anything but molecular solids are nonvolatile. A test that didn't work well in this lab was the melting portion of the lab because there wasn't enough fire. But really, the lab was very well produced all-around. If I had one complaint, it would be the substances chosen. Some portions there was little to no variety and in others there were no defining factors between substances, even when just looking at them (cobalt chloride excluded).
Night y'all!
Anyway, the most recent lab, Classification of Solids, meant burning innocent test tubes- I mean melting the substances inside the test tubes!- seeing if they were soluble, and seeing if they could conduct electricity. The questions related to this lab were mostly interpreting the results and actual questions relating to the knowledge acquired during the lab.
I suppose I should answer those.
An ionic solid would be soluble in water and conduct electricity in the melt, a network solid would be soluble in organic solvents, a metal would conduct electricity when under pressure (or at just about any other time), and a molecular solid would be slightly soluble in water and slightly conductive in said solution. If a solid was white at room temp, melted at 80 degrees Celsius and the melt had slight electrical conductivity it would be an ionic solid because it is presumably crystalline and conducts electricity. If a white solid melted at 1000 degrees Celsius and was insoluble in all solvents, and didn't conduct electricity at all, it would be an inorganic network solid. Potassium is a metal, Calcium Carbonate is an inorganic network solid, Octane is a molecular solid, and Hydrogen Chloride is a molecular solid as well. Speaking generally, metals are insoluble in water, network solids are ductile and malleable, and about anything but molecular solids are nonvolatile. A test that didn't work well in this lab was the melting portion of the lab because there wasn't enough fire. But really, the lab was very well produced all-around. If I had one complaint, it would be the substances chosen. Some portions there was little to no variety and in others there were no defining factors between substances, even when just looking at them (cobalt chloride excluded).
Night y'all!
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