Equilibrium Law & Equilibrium Constant

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Description and Tags

For IB:

Chemistry

Kinetics

IB Chemistry (HL)

Chemical Kinetics

11th

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8 Terms

1
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What is the Equilibrium Constant Expression? How is it represented?

the mathematical description of a chemical system at equilibrium using a balanced chemical equation at constant temperature

if we represented an equation as:
aA + bB ⇌ cC + dD

<h4 collapsed="false" seolevelmigrated="true"><em>the mathematical description of a chemical system at equilibrium using a balanced chemical equation at constant temperature</em></h4><p>if we represented an equation as:<br><strong>aA + bB </strong>⇌<strong> cC + dD</strong></p>
2
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What does Kc represent? What is its unit?

equilibrium constant

no units

3
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What would the Equilibrium Constant Expression of the following equation be?:

cC + dD ⇌ aA + bB

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4
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What is the effect on the K value if coefficients are halved?

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5
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What is the effect on the K value if coefficients are doubled?

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6
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What is the effect on the K value if the equation is reversed?

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7
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What is the effect on the K value if two equations are added together?

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8
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<h3 collapsed="true" seolevelmigrated="true">What do these tables tell us about Equilibrium Constants?</h3><p></p>

What do these tables tell us about Equilibrium Constants?

  • Kc ONLY changes with TEMPERATURE

  • If all other variables remain constant, Kc will remain unchanged for that reaction (equilibrium law)!