1 / 0

Learning Goals

Learning Goals. identify common equilibrium constants, including Keq , Ksp , Kw , Ka, Kb and write the expressions for each solve problems related to equilibrium by performing calculations involving concentrations of reactants and products. Equilibrium Law.

glyn
Download Presentation

Learning Goals

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Learning Goals identify common equilibrium constants, including Keq, Ksp, Kw, Ka, Kb and write the expressions for each solve problems related to equilibrium by performing calculations involving concentrations of reactants and products
  2. Equilibrium Law mathematical description of chemical system at equilibrium defined by the equilibrium constant, K Complete Inv. 7.2.1 on p. 473-474
  3. Writing Equilibrium Law Equations For aA + bBcC + dD, K = [C]c[D]d (omit units) [A]a[B]b omit (s) and (l) include only (aq) and (g) Ex. H2(g) + S(l) H2S(g) Ex. NH3(g) + H2O(l) NH4+(aq) + OH-(aq) p. 431 #1-3, p. 434 #1
  4. Calculating K Write the equilibrium law equation. Substitute [ ]eq K can be used to predict the equilibrium position (Review Equilibrium Position table in lesson 1 and add a column for K.)
  5. Sample Problem 2 (p. 430) In a closed vessel at 500°C, N2(g) + 3 H2(g) 2 NH3(g) The equil. conc. of N2, H2 and NH3, respectively, are 1.50 x 10-5 M, 3.45 x 10-1 M and 2.00 x 10-4 M. Calculate K.
  6. Sample Problem 3 (p. 431) In a closed vessel at 500°C, 2 NH3(g) N2(g) + 3 H2(g) The equil. conc. of N2, H2 and NH3, respectively, are 1.50 x 10-5 M, 3.45 x 10-1 M and 2.00 x 10-4 M. Calculate K. K (synthesis of ammonia) K’ (decomposition of ammonia) Mathematical relationship b/w K and K’? K = 1/K’
  7. What does the magnitude of K tell us about the equilibrium position? A. In a closed system at 25°C, 2 CO(g) + O2(g) 2 CO2(g) K = 3.3 x 1091 B. Decomposition of water at 1000°C, 2 H2O(g) 2 H2(g) + O2(g) K = 7.3 x 10-10 C. NO2(g) + NO(g) N2O(g) + O2(g) K = 0.951
  8. Homework p. 436 #1-6
More Related