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chem paper 1 > reaction with metals and oxygen > Flashcards

reaction with metals and oxygen Flashcards

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1
Q

what kind of reaction is gaining oxygen

A

oxidation

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2
Q

metal + oxygen =

A

metal oxide

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3
Q

what is losing oxygen

A

reduction

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4
Q

metal + water

A

metal hydroxide + hydrogen

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5
Q

how are metals displaced

A

more reactive metals displace less reactive chemicals

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6
Q

half equation: oxidation =

A

loss of electrons

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7
Q

what is acid state symbol

A

(aq)

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7
Q

half equation: reduction =

A

gain of electrons

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8
Q

hydrochloric acid formula

A

HCL

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9
Q

sulfuric acid formula

A

H2SO4

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10
Q

nitric acid formula

A

HNO3

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11
Q

how do acids dissociate and what does this produce

A

acids dissociate in aq solutions to produce H+ ions

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12
Q

HCL —->

A

HCL —-> H+(aq) + Cl-(aq)

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13
Q

what are bases and alkalis

A

chemicals which neutralises acids

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14
Q

what do acids and alkalis or bases produce

A

salt + water

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15
Q

what are bases and alkalis usually

A

metal oxides or hydroxides

16
Q

how are alkalis different from bases

A

alkalis are soluble in water

17
Q

what do alkalis produce in aqueous solutions

A

OH- ions

18
Q

what is produced in neutralisation

A

water
H+ + OH- —> H2O

19
Q

acid + metal

A

acid + metal —> salt + hydrogen

20
Q

acid + base

A

salt + water

21
Q

acid + alkali

A

salt + water

22
Q

acids + metal carbonates

A

salt + water + carbon dioxide

23
Q

strong vs weak acids in aqueous solutions

A

strong acids fully ionise while weak acids partially ionise in aqueous solutions

24
Q

what are 3 weak acids

A

carbonic acid
ethan pic acid
citric scid

25
Q

what does the ph scale give an idea of

A

the concentration of hydrogen ions

26
Q

as the ph scale..

A

as the ph scale decreases by one unit the concentration of hydrogen atoms increase by 10 times

chem paper 1 (7 decks)

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