weak acids and bases

what is a proton acceptor

a base

what is a proton donor

an acid

what is a definiton of an acid

it donates H+ to its environment

what is the ionisation or dissociation constant

Ka

if numerator > denominator what does this mean regarding the ka and acid and base

Ka is large and acid is strong

if denominator > denominator what happens regarding the ka and acid or base

Ka is small and acid is weak

what is the Ka equation

what is the ionisation or dissociation constant

Kb

if numerator > denominator what happens in regards to the kb and acid/base

Kb is large and base is strong

if denominator > numerator what happens in regards to kb and acid/base

Kb is small and base is weak

whar is the equation for Kb

how to calculate pH for weak acids

• set up an equilibrium equation and determine the H+ using Ka equation

• then use Ph = -log (h+)

what is a bronsted acid

a proton donor

In an equilibrium equation, if HA is an acid, indicate what the resulting A^- is called.

conjugate base

True or false.

A base with a low pKa value is classed as a weak base.

TRUE

True or false.

When comparing two acids, the acid with the higher pK_a is the strongest acid.

FALSE

the acid with the lower pka is the strongest

Indicate what the resulting pH of a solution with a strong acid and a weak base will be.

acidic with a pH less than 7