Card Set Information
equilibrium expressions le chateliers principle chem test
Writing expressions, manipulating expressions & stress on K
What do you ignore in the rection when writing equilibrium expressions?
Solids & Liquids
How will the solutions be written? (in what form of concentration i.e. moles, molality, etc..)
What do these brackets  stand for in equilibrium expressions?
The concentration of the ion in Molarity
K= What over What?
Rewrite this using the equilibrium expression: aA+bB=cC+dD
If Q < K, then _________
Reactants -> Products.. Shifts to the right
If Q = K, then ______.
Equilibrium is reached
If Q > K, then _______.
Products -> Reactants.. Shift to the left
If K < 1, then _______.
Reactants are favored
If K > 1, then ________.
Products are favored
If we multiply a reaction by N, then what is the new formula for K?
N=the # that changed the reaction
If the reaction is reversed, then what is the formula for the new K?
How many different types of stress have an impact on K?
What are the different types of stresses & impacts on K?
1) Adding/Removing reactants or products
2)Change in Pressure/Volume (only gases)
3)Change in Temperature (adding/subtracting temp)
When adding Pressure, what happens to the volume?
When adding volume, what happens to the pressure?
When volume is added, which direction does the reaction point to?
In direction of most moles
When pressure is added, which direction does the reaction point to?
In direction of less moles
When adding temperature to an endothermic reaction, which way does the reaction shift?
Endothermic: acts as reactant (+ value) Shifts to the right
When adding temperature to an exothermic reaction, which way does the reaction shift?
Exothermic: acts as products (- value) Shifts to the left
How can you tell if a reaction is exothermic?
It has a negative value, or acts as the products
How can you tell if a reaction is endothermic?
It has a positive value, or acts as the reactants