Acids, Bases and Kw Flashcards
what are bronsted-lowry acids
proton donors
what happens when you mix Bronsted-Lowry acids with water, what do they form with water
they release hydrogen ions, they combine with H2O to form hydroxonium ions,H3O+
what are Bronsted-Lowry bases, what happens to them in solution
they’re proton acceptors, they grab hydrogen ions to form water molecules
what happens to strong acids in water
they dissociate completely, they release nearly all the H+ ions
what happens to strong bases in water
they ionise almost completely too, they release nearly all their OH- ions
what happens to weak acids in water
they only dissociate slightly, very little H+ ions are formed
what happens to weak bases in water
they only ionise slightly in water, not many OH- ions are formed
when an acid is added to water, what does water act as
as a base
what happens to water in water
water dissociates into hydroxonium ions and hydroxide ions
where does the equilibrium for water dissociation lie
very far to the left
what is the ionic product of water
if you multiply the expression for Kc by [H2O] you get a new constant called, Kw
what is the formula for Kw
Kw = [H+] [OH¯]
in pure water what is the ratio of ions, and what can you say about the formula for Kw from this
there is always 1 H+ ion for each OH- ion, Kw becomes Kw=[H+]^2
