Conservation Science Tutorials: Teas Charts

Question 1

Bonds not usually affected by Solvents

Answer 1

Question 2

Describe Solvents

Answer 2

Question 3

What are Van der Walls Forces

Answer 3

Question 4

Describe London Dispersion Forces

Answer 4

Despite the fact that these forces are small and transient there are millions of them present. They are the main bonds holding polythene together.

Question 5

Van der Waals Forces (3)
D___ Forces
K_____ Interactions
Hydrogen Bonding

Answer 5

Question 6

Describe Electronegativity

Answer 6

Question 7

Diagram of the Periodic Table and Electronegativity

Answer 7

Question 8

1. Molecules that have either a permanent or transient dipole have inter-molecular forces that are important for solvent action.

True
False

Answer 8

True

Question 9

2. The following type of bond is most affected by solvents:

Metallic bonds
Covalent bonds
Bonds involving Van der Waals forces

Answer 9

Van der Waals

Question 10

3. In conservation work, the solvent used to remove stains or soften adhesives is always used in great excess to ensure complete removal.

True
False

Answer 10

False

Question 11

Describe the three properties described by a Teas chart

Answer 11

Question 12

Diagram showing how to calculate fractional perameters in a teas chart, and the sum of all 3

Answer 12

Question 13

Diagram of a Teas Chart

Answer 13

Question 14

Example Fractional Solubility Parameters

Answer 14

Question 15

Effect of Functional Group on Teas chart

Answer 15

Question 16

Describe ‘Like dissolves Like’

Answer 16

Question 17

How to work out fractional solubility parameters for mixes of solvents

Answer 17