Chemistry 11:  Today I collected Unit 8 # 62 - 67.  We took notes on Covalent Bonding, read pg 176 - 179, and did U8 # 69-72.  We made a homemade WS, and practiced making Lewis dot structures for Covalent compounds and polyatomic ions, which are contain covalent bonds within.  Click here for the homemade WS.  Lab 12B Procedure 1,2,4 was started, but more time will given on Friday for this.  A take home mini quiz was given at the very end.  Due Friday is the mini quiz, Lewis dot sheet, and # 69-72.

Chemistry 12:  We started with Kb Calculations:  Unit 4 # 84-88 and 80.  Then we did Mini Review 4.1 - 4.15 (click here for this).  In the second half we read U4.17, and did U4 # 108-118.  We finished with a quiz on Ka calculations.

84.  0.024 M SO₃^2-

85.  0.0019 M OH^-, pH 11.28, pOH 2.72,  5.3 x 10^-12 M H⁺

86.  0.059 M N₂H₄

87.  K_b = 1.04 x 10^-3

88. pH 11.50

66.  0.929 g LiOH

80.  K_a = 2.06 x 10^-10