1.  Find the popsicle stick with your name on it and sit there  Put your Net Ionic Reaction lab in the basket  Take out your notes from last night  Work on the following with your table: What volume (in mL) of a 0.150 M HNO 3 solution will completely react with 35.7 mL of a 0.108 M Na 2 CO 3 solution according to the following balanced chemical equation: Na 2 CO 3 (aq) + 2HNO 3 (aq) –> 2NaNO 3 (aq) + CO 2 (g) + H 2 O(l) If you finish, calculate the mass (in grams) of carbon dioxide that forms

2.  Substances that dissolve in water to form charged particles are called electrolytes Strong electrolytes dissolve a lot – lots of charged particles  Examples: NaCl, HCl and NaOH (all strong acids and bases), all soluble ionic compounds Weak electrolytes dissolve a little – only a few charged particles  Weak acids and bases (e.g. HCH 3 COO) Nonelectrolytes don’t form charges at all  Examples: sugar, AgCl

3.  Take 15 minutes to read the background information and formulate a plan You need to determine what the murder weapon was and what its molarity is  Work with the other two people at your table  By the end of the day today, you should know the identity of the murder weapon (not the concentration)

4.  Brainstorm how you will determine the molarity of the murder weapon  Section 4.6 – due Monday  Review questions 1-13 due Tuesday (grab one from on top of the projector before you leave!)

5.  Create a particle view for the following molar solutions. Begin with the 2.0 M solution containing 20 particles. 2.0 M HCl 1.0 M HCl 0.5 M HCl