Water and Life

Question 1

Polar covalent bond results in….

Answer 1

differing charges seen at regions of the molecule

Question 2

Hydrogen bonds result from ….

Answer 2

unequal sharing

Question 3

With a ____ # of hydrogen bonds the _____ becomes _____

Answer 3

large; strength: additive

Question 4

The ______ of hydrogen bonds is what is responsible for ______ properties

Answer 4

abundance; water

Question 5

Hydrogen bonds are ….

Answer 5

transient ( do not persist for long periods of time)

Question 6

In H2O the oxygen is …

Answer 6

partial negative

Question 7

In H2O the hydrogens are …

Answer 7

partial positive

Question 8

The four emergent properties of water are….

Answer 8

1) cohesive behavior
2) ability to moderate temperature
3) Expansion upon freezing
4) Versatility as a solvent

Question 9

In a solid state water is organized as a …

Answer 9

crystal lattice structure

Question 10

In a solid state the maximum amount of hydrogen bonds water can form is…

Answer 10

4

Question 11

In a gaseous state no _____ can form and there is more _____

Answer 11

hydrogen bonds; kinetic energy

Question 12

In a liquid state for water there is a moderate amount of ____ and ____ hydrogen bonds can be formed

Answer 12

kinetic energy; 3.4

Question 13

Hydrogen bonds allow for ….

Answer 13

Adhesion

Question 14

Adhesion is the…

Answer 14

interaction of a water molecule with something else + needs to have a charged region

Question 15

___ water moving freely allows for _____ to take place

Answer 15

Liquid; cohesion

Question 16

Cohesion is …

Answer 16

the ability of water to interact with other water which causes them to stick together ( water to interact with each other)

Question 17

Adhesion + cohesion allow for ______ within plants and is _____ then gravity

Answer 17

directional movement; gravity

Question 18

Cohesion produces____

Answer 18

surface tension

Question 19

Surface Tension is….

Answer 19

the measure of how difficult it is to break the surface of the liquid

Question 20

Surface tension occurs due to the water molecules at the surface being ______ to _______ then other molecules

Answer 20

more attracted; each other

Question 21

Water can ____ + ____ large amounts of heat with only a _____ to its own temperature

Answer 21

release + absorb; slight change

Question 22

The slight change in water temp is due to more ___ needed to break ____

Answer 22

energy; hydrogen bonds

Question 23

Specific heat is…

Answer 23

The amount of heat 1 gram of substance must absorb or loose to change its temp by 1C

Question 24

Water has ____ specific heat

Answer 24

high

Question 25

When heat is ______ H bonds ____

Answer 25

absorbed; break

Question 26

When heat is _____ H Bonds _____

Answer 26

released; formed

Question 27

The ___ specific heat of water is going to ______ temperature fluctuations to stay within limits of ______

Answer 27

high; minimize; viability

Question 28

The high specific heat of water prevents the ______ from getting _____ to quickly

Answer 28

body; hot

Question 29

Evaporation is....

Answer 29

the transformation of a substance from a liquid to a gas

Question 30

In water vapor far more ______ occur + ____ of H Bonding

Answer 30

collisoins; absence

Question 31

From Liquid to gas there is ____ KE to cause _____ between H bonds

Answer 31

enough; dissociation

Question 32

Heat of Vaporization is...

Answer 32

the amount of energy required to change 1 gram of a substance from a liquid to a gas

Question 33

The evaporation of body heat ____ the body + prevents _____ to preserve _______

Answer 33

cools; overheating; biochemical reactions

Question 34

The crystal lattice structure allows for ____ to be more _____, therefore the _____ is less dense then _____

Answer 34

H bonds; far apart; solid; liquid

Question 35

Expansion upon freezing allows for ____ to float, water to freeze from ____ to ____, allows for _______ to survive

Answer 35

ice; top; bottom; living organisms

Question 36

Water is a ____ solvent because of its _____

Answer 36

versitile; polarity

Question 37

Water will gather around a _____ molecule to form a ______

Answer 37

charged; hydration shell

Question 38

A solution has a _________ of contents within that vessel

Answer 38

uniform distribution

Question 39

An aqueous solution is ...

Answer 39

a solution with water as the solvent

Question 40

What is this image depicting ?

Answer 40

Hydration of sodium

Question 41

What is this image depicting ?

Answer 41

Hydration of chloride

Question 42

Water can also dissolve ________ due to the _____ regions in their structure

Answer 42

large soluble proteins; polar

Question 43

If their are ___ properties or ___ properties then a molecule is considered _____, which can _____ with water molecules

Answer 43

polar; ionic; hydrophilic; interact

Question 44

Hydrophilic

Answer 44

affinity for water

Question 45

Hydrophobic

Answer 45

no affinity for water

Question 46

The breaking of bonds is referred to as ____, which can shift properties to either be more _____ or _____

Answer 46

ionization; acidic; basic

Question 47

The effects of pH

Answer 47

1) effect shape + function 2) rate of chemical reaction 3) ability for molecule to successfully interact or bind 4) ability for ions to dissolve in water

Question 48

pH for blood is _____ ,it is _______

Answer 48

7.35-7.45, slightly alkaline

Question 49

Buffers are...

Answer 49

substances that can minimize changes in concentrations of hydrogen ions or hydroxide ions within a solution

Question 50

Buffers can ____ the pH in our ____ and is a mechanism to ______ shifts in _______

Answer 50

maintain; blood; counteract; either direction

Question 51

Buffers can ____ H ions when ____ is added

Answer 51

release; base

Question 52

Buffers can _____ H ions when ____ is added

Answer 52

Absorb; acid

Question 53

Buffers are ______ exhaustive

Answer 53

not