Lesson 3- Solubiluty And intermolecular bonds/Forces

Question 1

Rule of solubility

Answer 1

• Like dissolves like
• Polar molecules will dissolve in water
• Non-Polar molecules will dissolve in oil

Question 2

Two types of solubility substances in water

Answer 2

Hydrophilic, hydrophobic

Question 3

Hydrophilic

Answer 3

Water loving

Compounds dissolve in water because they are polar/charged and can form intermolecular bonds.

Eg. Salt - dipoles of water attracted to charged ions.
Sugar - Dipoles from polar molecules attract to dipoles of water

Question 4

Hydrophobic

Answer 4

Water Hating

Compounds do not dissolve in water because they are non-polar and cannot bind to it

Eg. Gasoline - Non-Polar compound of C and H

Question 5

Intermolecular Bonds:

Answer 5

Bonds between different molecules

Question 6

Different types of intermolecular bonds

Answer 6

Hydrogen bonds,
London bonds/forces,
Van der Waals

Question 7

Hydrogen bonds

Answer 7

Weak forces between polar molecules and hydrogen of another molecule (like water) due to dipoles

Between hydrogen of one molecule and molecules with N, O, or F

Question 8

Water and Hydrogen Bonds

Answer 8

Since water is polar, it can attract other water molecules
—> Cohesion

Water also attracts to other molecules
—> Adhesion

Question 9

London Bonds/Forces

Answer 9

• Weakest
• Between all molecules
• Temporary unequal distribution of electrons
• AKA dispersion forces

Question 10

Van der Waals

Answer 10

• Dipole-dipole
• Polar molecules