+ WELCOME! 1.Organize the materials in your folder in your binder. 2.Get out your homework.

+ Chair, Trash, and Detention Challenge Small Business

+ Experiment

+ How do you know whether or not a chemical reaction can be reversed?

+ 1.Many chemical reactions have _________________ reactions and ___________________ reactions. 1.____________________________: The state when concentrations of the reactants and products have no net change over time Equilibrium

+ Reversible Reactions 2SO2 + O2 ⇌ 2SO3 2SO2 + O2  2SO3 2SO2 + O2  2SO3

+ 3.______ ____________________________ ________________________: If a chemical system at equilibrium experiences a change in concentration, temperature, volume, or pressure, then the equilibrium will shift to counter act the change and return to equilibrium. Equilibrium

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+ 2SO2 + O2 ⇌ 2SO3 Add O2

+ 2SO2 + O2 ⇌ 2SO3

+ Subtract 2SO2

+ 2SO2 + O2 ⇌ 2SO3

+ 1)Create a mound (extra) or hole (loss) for your substance 2)If a substance is removed, the reaction will shift toward the removed substance 3)If a substance is added, the reaction will shift away from the added substance Predict the outcome of a change in equilibrium for the following reaction liquid + heat ⇌ vapor ChangeShift Toward Addition of liquid Removal of liquid Addition of vapor

+ 1)Create a mound (extra) or hole (loss) for your substance 2)If a substance is removed, the reaction will shift toward the removed substance 3)If a substance is added, the reaction will shift away from the added substance Predict the outcome of a change in equilibrium for the following reaction liquid + heat ⇌ vapor ChangeShift Toward Removal of vapor Increase in temperature Decrease in temperature

+ Determine which table or equation to use in the following problems 1. If 120g of KNO 3 are dissolved in 100g of H 2 O at 60 o C is the solution saturated, unsaturated, or supersaturated? _______________________________ Equilibrium

+ 2.Is NH 4 Cl soluble or insoluble in water? _______________________________ 3.A reaction calls for 10 mL of a 0.5 M solution of lithium chloride. You only have 2M and 0.3M solutions in your stock cabinet. Which could you do to make your solution? _______________________________ 4.What pressure, in atmospheres, is exerted by 0.5 mol of nitrogen gas in a 6.08 L container at 45 o C?_______________________________

+ Guided Practice Bankrupt w/ multipliers

x2 500 bankrupt x bankrupt x2

+ 2SO 2 + O 2 ⇌ 2SO 3 What will happen if I add O 2 ?

+ 2SO 2 + O 2 ⇌ 2SO 3 What will happen if I subtract O 2 ?

+ 2SO 2 + O 2 ⇌ 2SO 3 What will happen if I add SO 2 ?

+ 2 NO 2 (g) ⇌ N 2 O 4 (g) What will happen if I add NO 2 ?

+ 2 NO 2 (g) ⇌ N 2 O 4 (g) What will happen if I add N 2 O 4 ?

+ CO 2 (s) + heat ⇌ CO 2 (g) What will happen if I add CO 2 (g) ?

+ CO 2 (s) + heat ⇌ CO 2 (g) What will happen if I subtract heat ?

+ What equation or table do I use to solve the following problem? Convert the following. 15 o C to K

+ What equation or table do I use to solve the following problem? A reaction calls for 200 mL of a 1M solution of sodium hydroxide. You only have 2M and.5M solutions in your stock cabinet. What could you do to make your solutions?

+ What equation or table do I use to solve the following problem? What pressure, in atmospheres, is exerted by 0.5 mol of air in a 3.2 L container at 35 o C?

+ What equation or table do I use to solve the following problem? Determine the number of moles in a container given 2L at STP.

+ Independent Practice When you are done raise your hand and I will give you a POM You may not use notes on the POM NO SIDE TALK RULE APPLIES!