Intermolecular Forces and Properties of Water Flashcards Preview

Module 1: Lecture > Intermolecular Forces and Properties of Water > Flashcards

Flashcards in Intermolecular Forces and Properties of Water Deck (23):
1

The percent of our body weight that is water

60%

2

Total body water (in liters)

40

3

Amount of intracellular fluid water (in liters)

25

4

Amount of extracellular fluid water (in liters)

15

5

Breakdown of extracellular fluid water of plasma and blood (in liters)

10; 5

6

Where is the majority of water in the body?

Inside the cell (intracellular fluid)

7

Why is water so important?

Influences almost every molecular activity in the body; excellent polar solvent

8

The bonds in a water molecule are what kind?

Covalent

9

What is a covalent bond?

Sharing of electrons

10

Bond Strength - Covalent

200-400 kJ/mol

11

In a polar covalent bond, what is formed?

Permanent diple

12

What is the cause of ion formation?

extreme differences in electronegativity

13

What is an electrostatic interaction/ionic bond?

oppositely charged ions attract each other, NO sharing

14

What is the advantage that ionic bonds have over covalent bonds?

Partners are interchangeable

15

Bond strength - Ionic

20-40 kJ/mol

16

What is a hydrogen bond?

A dipole-dipole interaction where the partial positive is always contributed by a hydrogen; NO sharing

17

Bond Strength - Hydrogen

16-60 kJ/mol

18

What makes water such a good solvent?

permanent dipole and hydrogen bonding; polar and charged molecules readily interact with it

19

What is amphipathicity?

having both polar and non polar parts

20

Give an example of amphipathic molecules

Fatty acids, detergents

21

Bond Strength - London Dispersion/Van der Waals

2-4 kJ/mol

22

Percent NaCl in intravenous saline

0.9%

23

Who was Norbert Hirschorn?

Man who created the oral rehydration therapy concoction, saved people from dehydration