Friday, April 15

Today we started off by flipping our packets to page 23. Mr. H said that this would be somewhat difficult, because we would have to use already learned knowledge in order to be able to work out the problems. He said that we would start out easy. The new topic that we would be learning is Ksp. It is the last topic of the unit and we should know it for the major celebration we will be having on Wednesday. Mr. H noted that if we get stuck we should look at the examples listed in our packet, which are in the book. The first thing that we did on page 23 was some review on Ionic compounds. we had to write the formulas and name the compounds. Then we had some practice with solubility and balancing equations. Mr. H also noted that when he said that there are soluble and non-soluble compounds he meant that they are partially soluble. We had some practice with this on the bottom of page 23. We then flipped to page 24, and this is what we would be putting all of those concepts together for. As I said before, Partially soluble salts dissolve only slightly in water. The dissociation of the salts are controlled by a reversible reaction that has a very small K value (much less than one). This is known as a solubility product constant (Ksp). For 4 on page 24 we had to write the dissociation equation, in which we needed to have the solubility rules. If help is needed reference example 16.1 on page 4332 in the book. After that we did some more practice on page 21 with LeChatelier's Principle. Then at the end of class we had another reading quiz which I am sure everyone did well on.