🩷 Unit 2: Importance of Water

Question 1

How much of our total body weight does water make up?

Answer 1

2/3

Question 2

Properties of Water

Answer 2

• great solvent
• take part in chemical reactions
• high heat capacity
• great lubricant between organs & bones

Question 3

What chemical reactions does water take part in?

Answer 3

Hydrolysis & Dehydration

Question 4

Aqueous Solution

Answer 4

any solution with water as a solute

Question 5

Polar

Answer 5

unequal sharing of electrons (ex: H2O)

Question 6

Nonpolar

Answer 6

equal sharing of elctrons (ex: O2)

Question 7

Hydrophilic

Answer 7

molecules that mix with water
(ex: glucose

Question 8

Hydrophobic

Answer 8

molecules that don’t mix with water
(ex: oils, fats)

Question 9

Electrolytes

Answer 9

ions from broken ionic bonds that conduct electricity
(ex: Na+, Cl-, Ca 2+, Mg 2+, H+, K+)

Question 10

Solute

Answer 10

dissolves in another substance
(ex: salt, sugar)

Question 11

Solvent

Answer 11

substance that does the dissolving
(ex: water)

Question 12

Solution

Answer 12

homogeneous mixture of two or more substances (ex: saltwater, kool-aid)