chem quiz solutions

Question 1

what best describes a mixture

Answer 1

a combination of two or more substances physically combined

Question 2

what distinguishes a pure substance form a mixture

Answer 2

it has consistent properties and only one type of particles

Question 3

example of heterogeneous mixture

Answer 3

sand and salt

Question 4

heterogeneous mixture

Answer 4

a combination of substances in which the different components are not uniformly distributed

Question 5

example of pure substance

Answer 5

distilled water

Question 6

homogeneous mixture

Answer 6

uniform throughout, every part looks and behaves the same ( also called solutions)

Question 7

what term describes that something doesn’t dissolve properly

Answer 7

insoluble

Question 8

what does miscible mean

Answer 8

liquids that mix complete in any proportion

Question 9

immiscible

Answer 9

insoluble

Question 10

concentrated solutions

Answer 10

concentrated solutions have a higher ratio of solute to solvent

Question 11

dilute solutions

Answer 11

low solute to solvent ratio

Question 12

why are solutions considered stable

Answer 12

the compute does not settle out upon standing

Question 13

what do solutions look like

Answer 13

clear or transparent

Question 14

unsaturated solutions

Answer 14

a solution that can still dissolve more solute at a given temperature

Question 15

saturated solutions

Answer 15

maximum amount of solute that can dissolve at the given temperature

Question 16

supersaturated solutions

Answer 16

more solute than morally possible at that temperature

Question 17

what does high electronegativity tell you about an atom

Answer 17

it attracts shared electrons strongly

Question 18

electronegativity table ( left to right)

Answer 18

it increases

Question 19

electronegativity table ( up to down )

Answer 19

decreases

Question 20

what is the most electronegative element

Answer 20

fluorine

Question 21

polar bonds

Answer 21

unequal sharing of electrons creates partial charges

Question 22

nonpolar

Answer 22

no partial charges

Question 23

why do noble gases lack electronegativity

Answer 23

they don’t form chemical bonds

Question 24

what happens when two atoms with different electronegatives form a bond

Answer 24

high electronegativity attracts electrons more

Question 25

what causes formation of a dipole

Answer 25

unequal sharing of electrons creates partial

Question 26

is O2 nonpolar

Answer 26

yea

Question 27

hydrogen bonding

Answer 27

the positive end of one water molecule is attracted to the negative end of another

Question 28

dissociation

Answer 28

ionic solutes dissolve in water

Question 29

which part of water molecule is attracted to the cl

Answer 29

hydrogen

Question 30

hydration

Answer 30

particles become surrounded by water molecules

Question 31

universal solvent

Answer 31

water cause it bonds with polar and ionic substances

Question 32

what doesn’t dissolve well in water

Answer 32

oil and wax

Question 33

like dissolves like

Answer 33

substances with similar polarity dissolve eachother

Question 34

electronegativity

Answer 34

atoms ability to attract electrons in a covalent bond

Question 35

why are water molecules constantly moving

Answer 35

kinetic energy