ch3 Water and the Fitness of the Environment

Question 1

Polar molecule

Answer 1

The 2 ends of the molecule have opposite charges

Question 2

Cohesion

Answer 2

The binding together of like molecules; often by hydrogen bonds.

Question 3

Adhesion

Answer 3

The clinging of one substance to another

Question 4

Surface tension

Answer 4

A measure of how difficult it is to stretch the surface of a liquid

Question 5

Calorie

Answer 5

measure of heat it takes to raise a gallon of water by 1 degree Celsius

Question 6

Specific Heat

Answer 6

amount of heat that must be absorbed or lost to change 1 gallon of it by 1 degree celsius

Question 7

evaporative cooling

Answer 7

hottest molecules evaporate first.

Question 8

solvent

Answer 8

the dissolving agent

Question 9

solute

Answer 9

the substance that is dissolved

Question 10

hydration shell

Answer 10

a sphere of water molecules surrounding a dissolved ion

Question 11

colloid

Answer 11

stable suspension of fine particles in a liquid

Question 12

mole (mol)

Answer 12

6.02x10`23

Question 13

molarity

Answer 13

3 of mole of solute per liter of solution

Question 14

acid

Answer 14

increases H+ ion concentration

Question 15

base

Answer 15

decreases H+ ion concentration

Question 16

buffers

Answer 16

minimize changes in concentrations of H+ or OH-

Question 17

hydroxide ion

Answer 17

OH-