chem exam 3
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one step reaction
If K is >1
theres more products present
If K <1
theres more reactants present
Is equilibrium concentration effected by temperature?
Can a solid be a product of equilibrium?
How do you find equilibrium if an insoluble or slightly soluble material is placed in water?
the rate of dissolution of ions from the solid = the rate of precipitation of ions from the sturated solution
What is salt solubility dependent on?
- chemical reagents
What indicates the concentration of ions in solution will be quite low?
a small K
What rules can be useful for making qualitative predictions about whether or not two ions will form a precipitate?
a mixture of a weak acid with its conjugate base
an aqueous solution that resists the large pH changes observed whenever a strong acid or base is added to water
buffered mistures resist large pH changes bcause
the weak acid component neutralizes strong bases while the weak base component neutralizes strong acids
an acid that yields two H+ ions per acid molecule upon ionization
In order for equilibrium to occur neither reactants nor products can
escape from the system
this law expresses, for any rxn, the relationship btwn the concentrations of the reactants and products present at equilibrium
law of mass action
numerator of the equilibrium-constant expression is the
- product of the concentrations of all substances on the product side
- then raised to the power of their coeffiecent
Le Chatelier's principle
- If a system at equilibrium is disturbed by a change in:
- * temperature
- * pressure
- * concentration
- then the system will shift its equilbrium postition so as to counteract the effect of the disturbance
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