Honors science Chapter 5 Sec 1-3

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Chemical reaction

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24 Terms

1

Chemical reaction

When chemical bonds break or form

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2

Precipitate

A solid that can appear during chemical reactions

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3

Endothermic reaction

When energy is absorbed, temp drops

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4

Exothermic reaction

When energy is released, temp rises

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5

Subscripts

The small numbers that determine ratios

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6

Coefficients

The big numbers in front of formulas, multiplies small numbers

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7

Chemical equation

Shows chemical reactions

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8

Reactant

Part of a chemical equation, the part that gets changed

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9

Product

Part of a chemical equation, what you get from reaction

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10

Yield

The arrow in chemical equations

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11

Synthesis

Two or more substances combining to make a more complex thing

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12

Decomposition

Breaks down into simpler products

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13

Replacement

One element replaces another

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14

Activation energy

The boost of energy to get chemical reactions started

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15

Concentration

The amount of matter together, how close or apart

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16

Catalyst

Material increasing rate of chemical reaction

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17

Inhibitor

Material decreasing rate of chemical reaction

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18

Enzymes

Substance produced by living organism for a biochemical reaction

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19

Conservation of mass

Mass cannot be created or destroyed

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20

Formula mass

Number of atoms times atomic mass= formula mass

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21

Evidence of chemical reaction

Change in energy, temperature, production of gas, production of precipitate, color change

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22

Exothermic activation energy memory clue

Exothermic just needs to let it all out

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23

Endothermic activation energy

Needs energy to keep going

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24

Exothermic activation energy

Does not need energy to keep going

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