chemistry test

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combination of two or more substances not reacted

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35 Terms

1

combination of two or more substances not reacted

heterogeneous mixture

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2

two or more substances mixed not chemically combined (uniform throughout)

homogeneous mixture

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3

<1nm, no tyndall, no settle, no filter, Homogeneous

solution in terms of particle size, etc

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4

1-1000 nm, yes tyndall, no settle, no filter, heterogeneous

colloids in terms of particle size, etc

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5

1000 nm, yes tyndall, yes settle, yes filter, heterogeneous

suspension in terms of particle size, etc

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6

type of suspension where when setting the solid is at the bottom and the liquid is on top but when its stirred the solid flows like a liquid

thixotrophic mixture

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7

particles in a colloid are changed, the dispersion medium has opposite charges, these attractions and repulsions keep the particles suspended

why dont particles settle out in a colloid

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8

add ions of opposite charge to break attractions

what causes a colloid to settle out

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9

erratic movement of colloid particles due to collisions of particles

brownian motion

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10

scattering of light by particles

tyndall effect

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11

liquid/liquid colloid held together by an emulsifying agent

emulsion

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12

“like dissolves like”

how to determine if a substance will dissolve

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13

a substance that dissolves in solvent

soluble

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14

a substance that does not dissolve in a solvent

insoluble

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15

two liquids soluble in each other in any proportion

miscible

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16

two liquids that can be mixed but separate shortly after

immiscible

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17

amount of solute that will dissolve in a given amount of solvent

solubility

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18

full of solute

saturated solution

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19

not full of solute

unsaturated solution

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20

overfull of solute

supersaturated solution

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21

measure of how much solute is dissolved in a specific amount of solvent or solution

concentration

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22

is dissolved

solute

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23

does the dissolving

solvent

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24

solvent particles attract to solute particle, pull off a solute particle, completely surround that solute particle, continues until solute dissolved or solvent full of solute, only happens at attraction of solvent for solute is stronger than solute particle attractions

describe how a solute dissolves in a solvent

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25

speeds it up, exposes solute to fresh unsaturated solvent continuously

stirring

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26

higher temp speeds it up, more ke=faster solvent=more dissolving

temperature

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27

smaller is faster, more surface area

particle size

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28

increase temp=increase solubility

how does temperature affect solubility for solids?

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29

increase temp=decrease solubility

how does temperature affect solubility for gases

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30

increase pressure=increase solubility

how does pressure affect solubility for gases

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31

a property that depends only upon the number of solute particles not the identity of the solute

define a colligative property

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32

vapor pressure of a solution is less than that of pure solvent, less water with enough KE to escape surface= less vapor pressure

vapor pressure lowering

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33

freezing point of a solution is lower than the freezing point of the pure solvent, solute disrupts the formation of orderly pattern in a solid

freezing point depression

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34

boiling point of a solution is higher than that of a pure solvent, adding solute decreases VP must add more KE to raise VP of liquid to atmospheric pressure

Boiling point elevation

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35

water moves to make concentrations equal side with more particles applies more pressure to the membrane, more particles=more water moves=higher pressure

osmotic pressure

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