Announcements & Reminders Exam 2 Tomorrow 6:30 ? 7:30 pm here Exam coverage lecture 9 - today (p.65 to end Chapter 4) Practice exams available on Blackboard Homework 9 due Tonight 11:00pm Recommend use Firefox browser for Web Assign Must complete pre-lab questions BEFORE lab this week Proper lab dress required even though it?s Spring What is the concentration of NaOH in 50.00 mL of solution containing 0.25 mol of sodium hydroxide 0.05 M 0.25 M 2.0 M 5.0 M 50.M Graded Question In the decomposition of 2.0 mole of hydrogen peroxide H2O2 ? H2O + O2 The amount of oxygen gas formed is (Caution: Is the equation balanced?? Remember conservation of atoms & mass) A 0.5 molecule B 1.0 molecule C 2.0 molecule D 1.0 mole E 2.0 mole Reactions at the molecular level 2 H2(g) + O2(g) ? 2 H2O(g) Reactants Products Balancing atoms & moles Initial atom identity Correctly balanced ?? A Yes B No C Don?t know To Do 3/9/10 HO-9 Due Tonight 11:00 pm Exam 2 Tomorrow 6:30 ? 7:30 pm WTHR 200 Summarize lecture notes Ch 4 Practice Problems 4.16, 4.17, 4.18, 4.19 Ch 5 Practice Problems 5.1, 5.5, 5.7 Ch 4 Prob: 90, 92, 98, 100, 102, 104, 106, 110, 112, Ch 5 Prob: 4, 52, 60, Read text p. 164 - 169 and 175 - 189 for Thursday
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