Chemistry 12. :  After a short review we took notes on Strong Vs Weak Acids.  We read section 4.6 and did problems 21-25.  After break we made 500 mL of 0.1 M NaOH and we prepared lab 20G like usual.  We also took notes on Kw and started # 28-30.  All of the Hebdon problems are due on Friday.

Chemistry 11:  We began with a short review of Endo and Exothermic Reactions, followed by the Titration Calculations WS.  In the second half we began with our next unit, Atomic Structure and the Periodic Table.  We made simple paper models of atoms or ions, showing the electrons, protons, and neutrons within.  Only the Titration Calc WS is due Friday.  Our Reactions test will be on Tuesday.