What is Kc ?
The equilibrium constant
What does the magnitude of Kc tell us?
The relative proportions of the reactants and products
It tells us the side of the equation that the equilibrium lies on
What position is the equilibrium when Kc=1
Halfway
Reactants=products
Where does the equilibrium lie when Kc>1
Right
Products>Reactants
Where does the equilibrium lie if Kc<1
Left
Reactants>Products
How do you find the units for Kc?
Substitute the units into the equation
Cancel the common units to show the final units on a single line
What is a homologous equilibrium ?
All species are in the same physical state
What is a heterogeneous equilibrium ?
Contains species in at least two different physical states
What is different about the Kc equation for a heterogeneous equilibrium ?
Only include the aqueous or gaseous species
leave out the concentrations for solids and pure liquids
What is a mole fraction?
number of moles of the atom/total number of moles
There are no units for mole fractions
What is partial pressure ?
A gases contribution towards the total pressure
What is Kp?
The gas equilibrium constant
What do the units of Kp depend on?
The reaction equation
Units used for the individual partial pressures
What happens to the equilibrium position when you increase the concentration of a species ?
The equilibrium position shifts in the direction that reduces the concentration
What happens to the equilibrium position when you increase the pressure of a gas?
The position moves towards the side with the fewest gaseous molecules
What happens to the equilibrium position when you increase the temperature?
The position shifts in the endothermic direction
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chapter 29
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chapter 519
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chapter 618
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chapter 716
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chapter 86
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chapter 920
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chapter 1010
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key definitions for organic chemistry15
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naming alkanes9
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isomerism6
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chapter 1217
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chapter 1318
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alcohols14
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chapter 1515
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acids and redox8
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practical techniques in organic chemistry2
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recycling polymers7
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mass spectroscopy4
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infrared spectroscopy6
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preparing a standard solution11
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chapter 1811
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chapter 1917
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Chapter 2634
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chapter 2231
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Chapter 2034
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Chapter 2113
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Chapter 2318
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Chapter 2437
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Chapter 2723
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Chapter 2518
