A1.1 Water

Question 1

What is Polarity?

Answer 1

Molecules which contain an uneven distribution of charge

Question 2

Explain the polarity of Water?

Answer 2

The electrons present in the hydrogen bond are pulled closer towards the oxygen as its more electronegative. Causing charges to be created.

Question 3

How is a Hydrogen bond created?

Answer 3

It is created when multiple h20 molecules get together the negatively charged side of oxygen is attracted to the positively charged hydrogen end of another h20 molecules this created a h bond

Question 4

Are h bonds weak or strong ?

Answer 4

They are very weak

Question 5

What is Cohesion?

Answer 5

Water molecules stick to other water molecules caused because if the structure of the water molecules

Question 6

What is Adhesion?

Answer 6

Adhesion is how water molecules stick to other substances and molecules . This happened due to h2O polarity

Question 7

Describe the biological significance of the cohesive and adhesive of water?

Answer 7

-Surface Tension (Cohesive)
-Capillary Action (Adhesive)
-Xylem Water Transportation (Both )

Question 8

What is Hydrophilic?

Answer 8

Attracts water molecules
Example(salt)

Question 9

Physical properties of Water?

Answer 9

-buoyancy
- thermal conductivity
-

Question 10

Explain the thermal properties of water?

Answer 10

Water has Avery high specific heat capacitor so it allows it to absorb a lot of heat with only small temperature changes.

Question 11

Distinguish between hydrophilic and hydrophobic?

Answer 11

Water molecules interaction: Hydrophobic Repels Water molecules
Hydrophilic: Atrracts water molecules due to polarity
Dissolve: Hydrophobic does not dissolve and hydrophilic does dissolve with water
Polarity: Hydrophobic is non polar and Hydrophilic is polar