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Collins Book 2 - Key Words > Unit 4 - Explaining Chemical Changes 2 > Flashcards

Unit 4 - Explaining Chemical Changes 2 Flashcards

Acid reactions & combustion

1
Q

a process in which one or more substances are changed into others by their atoms being rearranged

A

chemical reaction

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2
Q

the substance formed when an acid reacts with a base

A

salt

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3
Q

the atom present in all acids

A

hydrogen

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4
Q

how reactive a substance is

A

reactivity

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5
Q

a type of compound containing carbon and oxygen

A

carbonate

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6
Q

the gas in the air used by plants to make food. It is produced during respiration, by burning fossil fuels or by acids reacting with metal carbonates.

A

carbon dioxide

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7
Q

a solution used to test for the presence of carbon dioxide

A

limewater

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8
Q

disruption of the digestion process often resulting in too much acid being produced

A

indigestion

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9
Q

when acid from the stomach irritates the upper digestive tract

A

heartburn

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10
Q

a substance that neutralises stomach acid

A

antacid

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11
Q

a substance that neutralises an acid

A

base

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12
Q

when an acid and a base react to form a salt and water and the resulting product has pH 7

A

neutralisation

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13
Q

a chemical put on soil to increase soil fertility and allow better growth of crop plants

A

fertiliser

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14
Q

a common idea that people share that is inaccurate

A

misconception

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15
Q

a material that is burned to release its energy

A

fuel

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16
Q

the process of burning

A

combustion

17
Q

a model to show the three things needed for a fire – heat, fuel and oxygen

A

fire triangle

18
Q

a chemical reaction in which heat energy is given out

A

exothermic

19
Q

something has energy if it has the ability to make something happen when the energy is transferred

A

energy

20
Q

a liquid chemical such as ethanol which can be used as a biofuel

A

alcohol

21
Q

is produced when sulphur is oxidised during the combustion of some fossil fuels and is one of the main gases that produces acid rain

A

sulphur dioxide

22
Q

rainwater that is made acidic by pollutant gases e.g. sulphur dioxide

A

acid rain

Collins Book 2 - Key Words (13 decks)

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