Campbell Bio unit 1 subject 3 (water)

Question 1

Water is the only substance on earth that can exist in its natural environment in all states of what?

Answer 1

Matter (liquide, solad, gas)

Question 2

explain polar covalent bonds

Answer 2

covalent bonds that spend more time closer to oxygen than hydrogen

Question 3

Polar molecules

Answer 3

The overall charge is not distributed evenly

Question 4

explain the difference in adhesion vs cohesion

Answer 4

cohesion holds molecules together, while adhesion holds one substance to another

Question 5

explain hydrogen bonds

Answer 5

a weak bond that holds a hydrogen molecule to another oxygen bond.

Question 6

what ability do water gliders have that they use to walk across the water?

Answer 6

surface tension

Question 7

define calorie

Answer 7

a calorie is the heat it takes to raise the temperature of 1 gram of water by 1 degree C.

Question 8

explain specific heat

Answer 8

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

Question 9

solvent

Answer 9

the thing doing the dissolving (water)

Question 10

Solute

Answer 10

the thing dissolving ( salt)

Question 11

solution

Answer 11

the mix of 2 or more solutions

Question 12

how/why is water such a fine solvent?

Answer 12

the polarity of water molecules

Question 13

hydrophobic substance

Answer 13

any substance that has an affinity for water (won’t mix with water)

Question 14

hydrophilic substance

Answer 14

any substance with an affinity of water ( will mix with water)

Question 15

acid

Answer 15

a chemical substance with a Ph less than 7

Question 16

Base

Answer 16

a substance that neutralizes acid and has a Ph of more than 7

Question 17

how many times more acidic is a pH of 3 vs a pH of 5?

Answer 17

100

Question 18

how many times more acidic is a pH of 12 vs a pH of 8?

Answer 18

10,000x

Question 19

whats the difference between a pH of 8 and a pH of 12 in terms of H+?

Answer 19

A pH of 12 is 10,000 more diluted than a pH of 8.

Question 20

how do buffers moderate pH?

Answer 20

they neutralize acids.

Question 21

explain the buffering system that minimizes blood pH change when you exercise and produce CO2

Answer 21

when acid enters the bloodstream the bicarbonate ions neutralize the hydronium ions forming carbon acid and water.

Question 22

what is the name for this compound: FeS

Answer 22

Iron (II) Sulfide

Question 23

what is the name of this compound: CCl4

Answer 23

Carbon tetrachloride

Question 24

wht is the formula for carbon disulfide

Answer 24

CS2