phy sci test 11 (chapter 15) study guide

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spontaneous reaction

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Description and Tags

base range is also called basic range, and acid range also called acidic range

43 Terms

1

spontaneous reaction

reaction that occurs without continuing outside help

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2

reversible reaction

reaction that proceeds either direction

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3

electrolytic cell

electricity produces a chemical reaction

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4

fuel cell

produces electricity and is continually replenished from outside source

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5

voltaic cell

chemical reaction produces electricity

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6

acid

sour taste

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7

base

bitter taste, slippery feel

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8

salt and water

formed by an acid and base

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9

reactants

substances that undergo chemical change (left)

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10

products

new substances produced (right)

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11

endothermic reaction

energy is absorbed

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12

exothermic reaction

energy is released

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13

reduction

an atom gains an electron

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14

oxidation

an atom loses an electron

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15

anode

where oxidation occurs

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16

cathode

where reduction occurs

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17

balanced equation

chemical equation that has the same number of atoms of each element on both sides

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18

activation energy

kinetic energy that’s necessary for molecules to react

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19

combination reaction

two or more substances combine to form a new substance

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20

decomposition

compounds break down

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21

organic chemistry

study of compounds containing carbon

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22

pH scale

represents concentration of hydrogen

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23

base range

range 7.1-14 on pH scale

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24

acid range

range 0-6.9 on pH scale

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25

acid-base indicator

substance that changes color depending on pH; example litmus

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26

alcohol

one or more hydrogen atoms are replaced by -OH groups

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27

alkane

single bonds between carbon

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28

alkene

one or more double bonds between carbon atoms

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29

alkyne

one or more triple bonds between carbon atoms

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30

aromatic

ring of carbon atoms

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31

carboxylic

contain the group -COOH

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32

ester

contain -COO- group

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33

haloalkanes

one or more hydrogen atoms replaced by halogen atoms (Cl, Br, or I)

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34
  • L = loss

  • E = electron

  • O = oxidation

  • G = gains

  • E = electrons

  • R = reduction

what does “LEO says GER” stand for?

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35

redox reaction

electrons are transferred between atoms

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36

first law of thermodynamics

relates energy gained by a system to the energy lost by its surroundings

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37

single-displacement reaction

an element in a compound is replaced by another element

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38

double-displacement reaction

two compounds exchange atoms or ions

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39

le chatelier’s principle

system at equilibrium is disturbed, the system will react to partially offset the disturbance

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40

neutralization

when a strong acid and strong base react to produce water and a salt

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41

electroplating

electrolytic cells form a thin coating of metal on an object

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42

buffer

doesn’t change in pH because it contains a weak acid and weak base

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43

chemical kinetics

deals with rates of chemical reactions

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