water

Question 1

functions of water

Answer 1

1. chemical reactant
2. universal solvent
3. medium for transport
4. as lubricant and shock absorber
5. regulates body temperature

Question 2

how does water regulate temperature

Answer 2

because of high heat capacity

Question 3

what is the structure of water

Answer 3

H2O. 3 atoms bound by hydrogen bonding

Question 4

a molecule that has electrical charge unequally distributed about its structure

Answer 4

dipole

Question 5

in the structure of water, what acts as the negative pole

Answer 5

the oxygen end

Question 6

what charge is the hydrogen end of water

Answer 6

positive

Question 7

what is the net charge of water

Answer 7

zero

Question 8

what causes water to be in liquid state

Answer 8

because of the hydrogen bond holding the water together

Question 9

water maximal density

Answer 9

4C

Question 10

specific gravity of water

Answer 10

1 (1ml=1g)

Question 11

high specific heat of water

Answer 11

1 calorie raise the temperature of 1 gram of water to 14.5-15.5C

Question 12

a unit of energy defined as the amount of heat required to raise the temperature of 1 gram of water

Answer 12

calorie

Question 13

why is water less dense than solid

Answer 13

because when water would be freezed, frozen water will form crystal like lattice whereby your molecules are set at fixed distances

Question 14

heat of vaporization define

Answer 14

the amount of energy to convert 1g of substance from liquid to gas

Question 15

water’s heat of vaporization

Answer 15

540 cal/g

Question 16

mechanism of vaporization. how does water evaporate

Answer 16

hydrogen bonds must be broken down

Question 17

it has a slight tendency to self dissociate in pure water

Answer 17

water molecule

Question 18

autoionization

Answer 18

a type of reaction that occurs when a substance ionizes as one molecule of the substance reacts with another molecule of the same substance

Question 19

if 2 water molecules are incontact with each other, they have a tendency to _____. why

Answer 19

ionize. because they are proteric

Question 20

the ability to act as acid or base

Answer 20

amphoterism

Question 21

chemical equilibrium

Answer 21

the state in which the reactants and products have no net charge over time

Question 22

this is when the reverse and forward reactions occur at equal rates

Answer 22

chemical equilibrium

Question 23

equilibrium constant

Answer 23

a mathematical quantity that expresses the relationship between the concentrations of the various ions present at equilibrium

Question 24

in pure water, at 25C, the molar concentration of water is

Answer 24

55.5 moles/L

Question 25

hydrated hydrogen ion

Answer 25

hydronium

Question 26

what is acid

Answer 26

can donate hydrogen

Question 27

what is base

Answer 27

can accept hydrogen

Question 28

the amount of solutes in moles per liter

Answer 28

molar concentration

Question 30

define specific heat

Answer 30

the quantity of heat required to raise the temperature to 1 gram of a substance by 1 degree Celsius