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chemical reactions Flashcards

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Organic Chemistry 101 flashcards
1
Q

what change is irreversible?

A

chemical

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2
Q

what is a reversible change called?

A

physical

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3
Q

what do we see during a physical change?

A

change of state. melting,freezing evaporation, condensation

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4
Q

what happens during a chemical change?

A

fizzing,change in colour or tempreature

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5
Q

combustion is…..

A

burning

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6
Q

what is the equation for combustion?

A

metal + oxygen —> metal oxide

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7
Q

combustion is an example of what?

A

an oxidation reaction

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8
Q

what is the definition of a fuel?

A

a substance that is burned to give out heat energy.

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9
Q

what is the test for oxygen?

A

if oxygen is present in a test tube a glowing splint will relight if held inside.

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10
Q

what is the test for hydrogen?

A

if hydrogen is present in a test tube a squeaky pop will sound when a light splint is held inside.

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11
Q

what is the metal and metal equation?

A

acid + metal —> salt + hydrogen

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12
Q

what acid creates a chloride salt?

A

hydrochloric acid

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13
Q

what salt does sulfric acid create?

A

sulfate

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14
Q

what acid makes a nitrate salt?

A

nitric acid

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15
Q

what is thermal decomposition?

A

when substances break down to simpler products when thay are heated

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16
Q

what is the equation for thermal decomposition?

A

metal crabonate —-> metal oxide + carbon dioxide

17
Q

carbon dioxide is created when …

A

metal carbonates decompose

18
Q

what do you do to test a gas to see if it is carbon dioxide?

A

it is bubbled through to lime water and if the lime water turns cloudy it is carbon dioxide.

19
Q

what is electrolysis ?

A

a process where compounds are decomposed

20
Q

define an exothermic reaction is?

A

when energy is given out. results in a rise in tempreture t

21
Q

what is an endothermic reaction?

A

energy is take in. resulting in a fall in tempreature

22
Q

when it ends in -ide it ….

A

it only has that element

23
Q

when it ends in -ate it ……

A

it contains that element and oxygen.

chemical reactions (1 decks)

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