Category Archives: General and Research Chemistry

Review for Unit 3 Test

Our Unit 3 Test will be on how we find out how much of a substance we have: using moles, or percent composition. It will also include questions on ionic bonding and naming and writing formulas for ionic compounds.  Here is the blank study guide.  I recommend that you complete the study guide and make sure you know how to do the problems for each learning target.  I will post the answers on Sunday, Dec. 4.

Unit 3 Study Guide without answers

Sept. 28/29 : Naming Ionic Compounds and Reviewing Vocabulary

If you were absent from class today, or just need a review, today our guiding question was:

How do we know what to name compounds, and we do we give them a name that is different from the elements that make them up?  For example, “Why is  AlCl3 called aluminum chloride?”

Here is a picture of the Table of Contents from today:

file-oct-01-3-18-23-pm

By the end of the lesson today, you will have learned how to:

  • Write the symbol and charge of an ion after being given the number of protons and electrons;
  • Write the formula of an ionic compound after being given the ions or the name;
  • Write the name of an ionic compound after being given the formula;
  • Define an ionic bond and explain how it holds ions together in a molecule.