F325 - Rates, Equilibrium and pH Flashcards
Describe zero order.
The rate is unaffected by changing the concentration in A.
What is the rate of reaction?
The change in concentration of a reactant or product per unit time.
Change in conc/time
Describe first order.
Proportional to the increase in concentration.
Eg increase of 3 then increase of 3.
Describe second order.
Increases proportional to the square of the concentration.
Eg concentration increases by 3.
Rate increases by 9.
What does a half life graph look like for first order?
Constant half life.
Describe a zero order Half life graph.
Half life decreased with time at a constant rate.
Describe a second order half life graph.
1/x
What changes Kc?
Temperature
What does a Kc value of 1 indicate?
Equilibrium is halfway between reactants and product
What does a Kc above 1 suggest.
Product favoured, shifts to the right.
When the forward reaction is endothermic how does Kc increase?
As temperature increases so does Kc.
What is Kc?
Products/reactions
Why is a Brønsted-Lowry acid and base?
Acid: any substance for which a proton can be removed.
Base: any substance that can remove a proton from an acid.
What is an alkali?
A base that dissolved in water forming OH- ions.
What is an acid base conjugate pair?
A pair of two species that transform into each other by gain or loss of a proton.
