simple equilibrium and acid base reactions 1.7 Flashcards
(16 cards)
whats the definition of dynamic equilibrium
rate of forward reaction equals rate of backwards reaction - concentrations of reactions and products remain constant
whats Le chantelier’s principle
when a system is subject to a change, the system will alter to oppose the effects of that change
what happens to a reaction in dynamic equilibrium if you change the temperature
if temperature is increases, it will favour the endothermic side as it needs heat absorbed
what happens to a reaction in dynamic equilibrium if you change the pressure
increasing the pressure will cause the reaction to favour the side which produced the least molecules as that would lower the pressure
what happens in a reaction in dynamic equilibrium if you change concentration
increasing concentration of reactants will favour forward reaction so more product is produced as more reactant is available.
what effect does a catalyst have on a reaction that is in dynamic equilibrium
doesnt effect the position of equilibrium but allows equilibrium to be reached faster.
what is the equilibrium constant, Kc
indicates position of equilibrium at certain tempertature. Kc always has the same values unless conditions change
what is the formula to find Kc
[C]c[D]d/[A]a[B]b aA+bB<–>cC=dD
what is an acid when reacting
a donor of H+ ions
what is a base when reacting
an acceptor of H+ ions
formula to find the pH
pH=-log10[h+]
formula to find [H+]
10^-pH
what the difference between a strong acid and a weak acid
a strong acid completely dissociates to ions, a weak acid only slightly dissociated into its ions
whats an Acid-base titration
a titration used to determine the unknown concentration of acid of base by finding neutralisation point
what’s a monoprotic acid
an acid which donates 1 H+ per water molecule when it dissociates in water
what is a diprotic acid
acids that donate 2 H+ per water molecules when it dissociates in water
