Warm Up 2-3-16 1.Use 2 words to describe this picture 2.Define reversible 3.When I'm young I'm tall When I'm old I'm short When I'm alive I glow Because.

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Presentation transcript:

Warm Up Use 2 words to describe this picture 2.Define reversible 3.When I'm young I'm tall When I'm old I'm short When I'm alive I glow Because of your breath I die What am I? Agenda -Notes Unit 7-1 -Next Year Course Selection -Finish Open House Poster Homework Open House Poster

UNIT 7-1 EQUILIBRIUM

Forward (Irreversible) Reactions Can only go 1 way (direction) Reactants Products Ex: 2H 2 + O 2 2H 2 O

Reversible Reactions Reversible reactions are reactions that can go forward and backward. Reactants Products

Equilibrium Equilibrium is a dynamic process involving continuous change. –they just do not produce a net change –The forward reaction rate is equal to the reverse reaction rate.

Equilibrium Constant (K eq ) Relationship between the concentrations of the products and the reactants in an equilibrium mixture. The equilibrium constant is given in an equation. aA + bB cC + dD the equilibrium expression is K eq = [C] c [D] d (products over reactants) [A] a [B] b Calculations Involve Moles We Skip!

Significant of Equilibrium Constant Value of K is > 1, the product side of the equation is favored (more products) Value of K < 1, the reactant side of the equation is favored (more reactants) Value of K = 1, the reaction is at equilibrium

Check In Fe 3+ (aq) + SCN - (aq) FeSCN 2+ (aq) (yellow) (red) What do you think will happen to the equilibrium reaction if you add more SCN - ions? What color will the solution be?

Next Year Science Course Selection Friday Feb 12 - AP lunch

Assignments -Notes Summary -Finish Open House Poster CRITERIA: -Select a concept we talked about in chemistry class - draw picture(s) -Incorporate mustang spirit -Must include the phrase “Mr. Vu is the Greatest”

Homeroom Senior Students Presentation Quote of the Week