Water review Flashcards Preview

Biochemistry > Water review > Flashcards

Flashcards in Water review Deck (29):
1

charges in water molecule

oxygen is partial negative
hydrogen is partial positive

2

angle of water molecule

104.5

3

electronegativity values are close

nonpolar covalent

4

electronegativity values are different

polar covalent

5

atoms are classified as metals

metallic bonding

6

atoms are classified as non metals

covalent bonds

7

electronegativity values are very different

ionic bonding

8

bond between oxygen and hydrogen is

polar

9

water is a ____ because the positive and negative charges are separate

dipole

10

three most important noncovalent bonds

ionic interactions
van der waals forces
hydrogen bonds

11

water molecules are attracted to each other by

hydrogen bonds

12

how many hydrogen bonds formed by one water molecule

4

13

occur between neutral, permanent, and/or induced dipoles

van der waals forces

14

water is considered the ideal biological solvent because

water can dissolve ionic and polar substances
water molecules form solvation spheres around ions

15

property of water to stick together

cohesion

16

property of water to stick with other substances

adhesion

17

hydrogen bonds because of surface area and pressure allows certain organisms to walk on water

surface tension

18

why are waters melting and boiling points exceptionally high

the hydrogen bonds

19

water has an exceptionally high heat of vaporization which

helps maintain an organisms internal temperature

20

contain both polar and nonpolar groups

amphipathic molecules

21

amphipathic molecules form

micelles

22

spontaneous passage of solvent molecules through a semipermeable membrane

osmosis

23

two big characteristics of osmosis

pressure required to stop net flow of water across a membrane
depends on a solute concentration

24

solutions are equal

isotonic

25

outside has fewer molecules than the inside

hypotonic

26

outside has more molecules than inside

hypertonic

27

addition of solutes to water _____vapor pressure

lowers

28

addition of solutes to water _____boiling point

increases

29

addition of solutes to water ____ the freezing point of water

lowers