quiz5_notes - Notes on Quiz 5: Please have a look at the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Notes on Quiz 5 : Please have a look at the past quizzes. 1. You should be able to get the pH of solutions of single salts, like question 3 in Quiz 4: split the salt completely into ions, consider which ion is going to be acidic or basic, write the corresponding equilibrium etc. 2. Buffer solutions: either a mixture of weak conjugate acid/base pair or a mixture obtained by partial neutralization of weak acid with strong base or weak base with strong acid, with weak component in excess . Na 3 PO 4 /Li 2 HPO 4 is the same as PO 3 - 4 /HPO - 4 which is a conjugate acid/base pair, and so is a buffer. 3. When a strong acid is added to a buffer, the H 3 O + will react with the base of the buffer. When a strong base is added to a buffer, the OH - will react with the acid of the buffer. You should be able to write the reactions for this. 4. Buffer capacity of buffer prepared from HA/A - has best buffer capacity at pH=p K a (HA), and the good buffer capacity range is a range of 2 pH units: =p K a (HA)
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/17/2008 for the course CHEM 173 taught by Professor Canagaratna during the Spring '08 term at Ohio Northern University.

Ask a homework question - tutors are online