Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

CHEM 113- Unit 3

percent dissociation [HA]dissociated/[HA]initial x 100
% dissociation is higher for more dilute initial acid concentrations
polyprotic acid >1 ionizable proton
what Ka value (of a polyprotic acid) controls pH? Ka1
anions of weak acids are weak bases
cations of weak bases are weak acids
small, highly charged metal cations make H3O+
strong acids (6) HCl, HBr, HI, HNO3, HClO4, H2SO4
lewis base donates an electron pair
lewis acid accepts an electron pair
what is formed in lewis acid/base rxns adducts
arrhenius acid H+
arrhenius base OH-
bronsted-lowry acid donates H+
bronsted-lowry base accepts H+
buffers contain a weak acid and its conjugate base (or vice versa) and are resistant to changes in pH
ratio to be a buffer 1:10
buffers have the highest capacity when concentrations of acid and base are equal
the more concentrated a buffer is... the higher its capacity (more base/acid can be added and still work)
useable range of a buffer +-1 unit of the pKa
buffer range the pH range over which the buffer acts effectively
indicators weak acids with distinct color changes between protonated and deprotonated forms
equivalence point when moles of acid=moles of base
equivalence point of strong acids/bases always 7
when does pKa=pH half way through buffer region [HA] and [A-] cancel
pH of weak base/strong acid <7
pH of weak acid/strong base >7
polyprotic acids (in titrations) have as many buffer region/equivalence points as ionizable protons
Created by: melaniebeale



Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards