Properties of Water

Question 1

H20

Answer 1

A polar molecule joined together by covalent bonds

Question 2

Hydrogen bonding

Answer 2

A process where polar molecules like water bond together to from a temporary bond that is 20 times weaker than a covalent bond

Question 3

Cohesion

Answer 3

Molecules sticking to each other

Question 4

Surface tension

Answer 4

Hydrogen bonds at the surface of a molecule point in the same direction creating a strong surface, more H-bonds on surface than interior

Question 5

Xylem

Answer 5

plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant and provides physical support through cohesion and Adhesion

Question 6

Adhesion

Answer 6

Adhering (Sticking) to a surface or object

Question 7

Temperature

Answer 7

the measure of average kinetic energy in molecules

Question 8

Heat

Answer 8

transfer of kinetic energy from one body of matter to another

Question 9

Specific heat

Answer 9

the amount of heat that must be absorbed or lost for 1 gram of a substance to change its temperature by 1 degree

Question 10

Evaporative cooling

Answer 10

Making water evaporate and using its high specific heat capacity to absorb lots of heat to cool down when temperatures are high

Question 11

Waters specific heat characteristic

Answer 11

Very high due to hydrogen bonding

Question 12

Why ice floats

Answer 12

Its hydrogen bonds are done from a further distance making it less dense than water

Question 13

Is water a solvent or solute

Answer 13

It is a good solvent due to its polarity

Question 14

Hydrophilic

Answer 14

Polar or ionic molecules that can be dissolved and like water

Question 15

Hydrophobic

Answer 15

Molecules that are non polar and not ionic that can’t be dissolved and fear water

Question 16

Hydronium

Answer 16

H3O+

Question 17

Dissociation in water

Answer 17

Water reacts with its self to create hydronium and hydroxide

Question 18

Acids

Answer 18

Donates H+ (Hydronium) ions

Question 19

Bases

Answer 19

Donate OH- or remove H+ ions

Question 20

pH steps

Answer 20

A 10x difference in concentration of H+ and OH-

Question 21

Metabolism

Answer 21

A reaction that is sensitive to pH levels but also released H+ and OH- ions

Question 22

Buffers

Answer 22

A reaction that can capture H+ and release H+ when needed helping keep an average pH level of 7, buffers are normally reversible reactions that work off equilibrium

Question 23

Global Warming and Water

Answer 23

Lots of CO2 in water creating more carbonic acid than needed causing more bicarbonate to be made than carbonate due to extra H+ which is bad for corals. Oceans don’t have much buffers and cant regulate the changes in pH that occurs because of this