unit 8 Flashcards
when does kw (pH = 14) hold true
only when the water is at 25 degrees celsius
what is an acid
a molecule that donates a hyrdogren atomwhat
what is a basic
a molecule that receives a hydrogen atom
if there is no water molecule produced in an acid equation what does that mean for the other products
they are not salt
OH name
hydroxide
H3O name and it’s abbreviation
hydronium or H+
what is method one to make a buffer
mixing a strong acid/base with a salt
what is method two to make a buffer how it creates more A-/B+ ions
add strong acid/base to a weak base/acid
in the case of a strong base added
the excess of the OH binds to the HA (the acid) creating water and therefore more A- ions
when pH is equal pKa what does that mean for HA and A concentrations
HA is equal to A
when pH is less than pKa what does that mean for HA and A concentrations
HA is greater than A
when pH is greater pKa what does that mean for HA and A concentrations
HA is less than A
how do i find the pH of a solution if one uses method two of a titration
use a rice chart
what do you use titration for
when you don’t know the molarity
how to find pka on the titration graph
half of the ml at the equivalence point then go up to find that pH
what is the first method to titrations
strong acid to strong bace titrations
what is the second method to titrations
weak acid to strong bace or weak bace to strong acid
do strong acids have a ka
no
what does a larger ka value mean
the stronger the WEAK acid
how do i find the intital concentration on a titration curve
mol/L used twice
the equivalence point of ml is when HA and A are equal so the A concnetration = the Acid concentration and the problem will give you some givens
what is a more electronegative on the periodic table
right and up
what determines the strength of an acid or base
the more elelctronegative the stronger and the more O’s the stronger
how to know if a salt will create a acid/basic/neutral solution
Strong - Strong reactions cancel each other out
Weak-Strong create an acid or base (depending upon which one is in excess OH or H
how to know if a salt will create an amphiprotic
if the reaction is weak -weak then the smaller the Ka the more in excess the OH or H is
