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Chemistry > Chemical Change > Flashcards

Chemical Change Flashcards

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1
Q

In oxidation

A

Loss of electrons

Often gains oxygen

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2
Q

In reduction

A

Gain if electrons

Often loses oxygen

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3
Q

What always occur together

A

Oxidation and reduction

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4
Q

Metals form with oxygen to form

A

Metal oxides

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5
Q

When metals react they

A

Lose electrons to form positive metal ions

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6
Q

The more easily a metal atom loses electrons, the more

A

Reactive it is

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7
Q

Metals react with acids to produce

A

Metal salt and hydrogen

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8
Q

In displacement reactions

A

A more reactive metal will displace a less reactive metal from a solution of its salt

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9
Q

Extraction of metal depends on

A

How reactive it is

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10
Q

When substances dissolve in water they..

A

Dissociate into their individual ions

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11
Q

Hudroxide ions make solutions

A

Alkaline

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12
Q

Hydrogen ions make solutions

A

Acidic

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13
Q

The ph scale is a measure of

A

The acidity or alkalinity of a aqueous soloution

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14
Q

Soliciting with ph 7 is

A

Neutral

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15
Q

Less than PH 7 is

A

Acidic

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16
Q

PH more than 7 are

A

Alkaline

17
Q

Ph of a solution can be measured using

A

Universal indicator of ph probe for more accurate

18
Q

Litmus paper

A

Change from blue or red

19
Q

Solouble bases are called

A

Alkalis

20
Q

Acids are neutralised by

A

Bases

21
Q

Acid+ metal hydroxide—->

A

Salt+water

22
Q

Acids contain

A

Hydrogen ions

23
Q

Alkalis contain

A

Hydroxide ions

24
Q

Acid+ metal oxide/—>

A

Salt+water

25
Q

Acid+ metal carbonate—->

A

Salt+water+carbon dioxide

26
Q

A salt is produced when

A

The hydrogen in the acid is replaced by a metal ion

27
Q

Hydrochloric acid produces(salt)

A

Chloride salts

28
Q

Nitric acid produce(salt)

A

Nitrate salts

29
Q

Sulfureux acid produces(salt)

A

Sulfate slats

30
Q

Hydrochloric strong or weak

A

Strong

31
Q

Ethanoic acid weak/strong

A

Weak

32
Q

PH of a solution is a measure of the concentration of

A

H+ ions

33
Q

Cryolite

A

Lowers the melting point of something

Cheaper

Chemistry (6 decks)

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