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## Chem 113 Week 7

by: Caroline Hurlbut

16

0

1

# Chem 113 Week 7 Chem 113

Caroline Hurlbut
CSU
GPA 3.7

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Basic equilibrium calculations using an ICE table
COURSE
General Chemistry II
PROF.
Ingrid Marie Laughman
TYPE
Class Notes
PAGES
1
WORDS
CONCEPTS
Chemistry
KARMA
25 ?

## Popular in Chemistry

This 1 page Class Notes was uploaded by Caroline Hurlbut on Friday March 4, 2016. The Class Notes belongs to Chem 113 at Colorado State University taught by Ingrid Marie Laughman in Spring 2016. Since its upload, it has received 16 views. For similar materials see General Chemistry II in Chemistry at Colorado State University.

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Date Created: 03/04/16
Equilibrium Calculations • ex. CO(g) + H2O(g)⁶CO2(g) + H2(g) Kc=0.64 You start with 1.0 mol CO and 1.0 mol CO2 in a 1 L ﬂask. You then add 2.0 mol H2O. What is the concentration of H2 at equilibrium? Check for equilibrium ﬁrst: Q does not equal 0—>system not in equilibrium Make ICE table: CO(g) + H2O(g) ⁶ CO2(g) + H2(g) Initial 1.0 M 2.0 M 1.0 M 0 M Change -x -x +x +x Equilibrium (1.0-x) (2.0-x) (1.0+x) x Kc = 0.64 = [1.0+x][x] [1.0-x][2.0-x] 0.64 = x + x^2 2 - 3x + x^2 0.64(2 - 3x + x^2) = x + x^2 -0.36x^2 - 2.92x + 1.28 = 0 *standard form ax^2 + bx + c = 0 -(-2.92) ± √(-2.92)^2 - 4(-0.36)(1.28) *quadratic formula 2(-0.36) x = -8.5, x = 0.42 *can’t have negative concentration [H2] = 0.42 M

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