8.7 Acid Base Titration

Question 1

Define titration

Answer 1

Process of adding a solution of a known concentration from a burette to a solution of a unknown concentration sample

Question 2

What is the purpose of titration

Answer 2

To determine concentration of an unknown solution and monitor pH changes

Question 3

What’s the sample

Answer 3

The solution being analyzed

Question 4

What’s the titrant

Answer 4

The solution in the burette

Question 5

What’s the equivalence point

Answer 5

Where number of moles of acids equals number of moles of base

Question 6

What’s the end point

Answer 6

Where the indicator changes color, signaling the equivalence point

Question 7

What’s a pH curve

Answer 7

A graph showing the change of pH as titrant is added

Question 8

What’s the point of a pH curve

Answer 8

To study pH changes during neutralization and determine solute concentration

Question 9

What’s an indicator

Answer 9

A substance added to sample to signal endpoint of a titration

Question 10

What are the features of a SA SB titration

Answer 10

1. Initial pH < 1 (strong acid)
2. pH increases gradually to eq point 7
3. pH jumps from 3 to 11

Question 11

What are the features of a WA SB titration

Answer 11

1. Higher initial pH
2. Has a flat part of the curve from WA and CB resisting pH changes
3. Eq point is > 7
4. Big jump to a high pH

Question 12

What is the half equivalence point in a WA SB

Answer 12

when pH = pKa

Question 13

Features of a WB SA

Answer 13

1. pH < 1
2. A flat curve where WB and CA resist change
3. EQ point < 7
4. Smaller pH jump to a low value