Class of: 12-Feb-2016.
Today we covered Section 7.3: Ionic Compounds: Chemical Formulas and Naming (p. 183).
Learning Objectives:
- Students will be able to produce the chemical formula of an ionic compound given its component elements or polyatomic ions.
- Students will be able to write the name for an ionic compound given its chemical formula.
Two interesting things today: pure, distilled water does not conduct electricity very well at all! This is because water is a molecular compound. In general, you rarely find pure water. Most water has ions dissolved in it that are harmless to drink, but do conduct electricity.
A lightning strike will disperse about 6 metres in water. It doesn’t travel very far because the electrical energy disperses in all directions very rapidly. If you think about it, 6 metres in all directions is a lot of water! Almost as dangerous as the electric shock is the sound that is created: as much as 300 decibels as far away as 100 metres, which is enough to kill fish and make humans lose their hearing in one shot.
Please work through the following review problems:
p. 191 #2-5