Acid-Base Titrations

Question 1

Acid-base titrations and oxo-red titrations have 3 requirements: (FSE)

Answer 1

1. fast
2. Of known and exact stoichiometry
3. Have a method to detect the endpoint

Question 2

HCL + NaOH –>

acid + base –>

Answer 2

• -> NaCl + H2O

- ->salt + water

Question 3

A neutralized solution has a pH of…?

Answer 3

Does NOT have to be 7. It depends on the nature of the salt formed

Question 4

How do you standarize a solution?

Answer 4

By using another chemical called a primary standard

Question 5

A primary standard….(3)

Answer 5

1. High purity
2. Known composition
3. Reacts with known stoichiometry

Question 6

What primary standard compound did we use to measure the molarity of NaOH?

Answer 6

KHP: potassium acid phthalate

Question 7

To standardize a solution, you must know…

Answer 7

weight of the KHP and the volume of NaOH solution required to exactly neutralize it

Question 8

mmol KHP =

Answer 8

mmol NaOH (acid=base)

Question 9

How did we standardize the HCL solution?

Answer 9

Using the already standardized NaOH solution

Question 10

The indicator (phenolphthalein) will turn ____ at the end point.

Answer 10

Pink for longer than 20 seconds