- #1

JwdePhysics

- 13

- 0

## Homework Statement

The questions asks which of the following would make a buffer given that all solutions are 0.100M and you have solutions of acetic acid, sodium hydroxide, and hydrochloric acid.

- 20.00mL of each solution is mixed.
- 20.00mL of acetic acid and 30.00mL of NaOH are mixed
- 30.00mL of acetic acid and 20.00mL of NaOH are mixed
- 20.00mL of acetic acid and 20.00mL of NaOH and 10.00mL of HCL are mixed.

## Homework Equations

None necessary

## The Attempt at a Solution

So I know that 2. is wrong because once all the acetic acid and NaOH are mixed, there will be 10 mL left of a strong base which is not a buffer. I know 3 is right because 30.00mL of acetic acid added to 20.00mL of NaOH will leave 10.00mL plus some base when the NaOH reacts so that creates a buffer. However I am not sure how to solve 1 and 4 with 3 solutions each. Does anyone have any advice for determining if 1 and 4 are right?