Buffers

Question 1

What is a buffer?

Answer 1

A soliton which resists changes in pH after adding acid or base

Question 2

What is the optimum range for a buffer

Answer 2

The pka of the conjugate acid +/- 1

Question 3

What is the general equation for buffers

Answer 3

[h]= k [base]/[acid]. <—- initial

Question 4

When is the Henderson hasselbaclh used?

Answer 4

Only for buffers

Question 5

What is the first step of the general approach to solve acid base mixtures for buffers and titanic

Answer 5

Step 1:
- see if components will react, if no reaction go to step two
- If they do react, fin the limiting reagent and what’s left in solution

Then go to step 2

Question 6

What is the second step of the general approach to solve acid base mixtures for buffers and titrations

Answer 6

Step 2:
- solve for pH , depending on the type of solution there will be 3 diff situations

See slide 12 lec 20