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chemistry 2 term 1 1/2 year 8 > L1:Reaction to acids > Flashcards

L1:Reaction to acids Flashcards

1
Q

name 2 indicators(PH)

A

universal indicator
litmus paper

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2
Q

whats an acid

A

An acid is a chemical substance, usually a liquid, which contains hydrogen and can react with other substances to form salts

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3
Q

whats an alkali

A

An alkali is any base substance that dissolves in water to produce OH (hydroxide) ions and neutralise acids.

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4
Q

PH of stong acid

A

1,2

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5
Q

PH of a weak acid

A

5,6

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6
Q

PH of weak alkali

A

8,9

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7
Q

PH of stong alkali

A

13,14

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8
Q

why can using diffrent indicator be helpful

A

so the PH is more accurate

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9
Q

What is neutralisation

A

What is Neutralisation? It is an acid-base reaction in which an acid reacts with a base to form salt and water.

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10
Q

name 5 acids

A

nitric acid
sulfuric acid
hydrochloric acid
ethanoic acid
lemon juice

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11
Q

are all acids dangerous

A

no

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12
Q

are all alkalis dangerous

A

no

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13
Q

true or false acids are corrosive but alkalis are not they just clean you

A

false the are both corrosive

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14
Q

what is stonger a stong acid or alkali

A

alkali

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15
Q

what should we do when handelling strong acid or alkalis

A

put gloves on make sure nothign spills on you if it does wash the part that touched the acid or alkali

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16
Q

name 3 neutral subtances and name the 100% neutrall 1

A

water is 100% neutral
saliva
blood

17
Q

what color does litmus paper go when it touchs a strong alkali

A

blue

18
Q

what color does litmus paper go when it touchs a strong acid

A

red

19
Q

what color does universal indicator go when it touchs a strong acid

A

red or dark orange

20
Q

what color does universal indicator go when it touchs a strong alkai

A

purple or dark blue

21
Q

what color does universal indicator go when it touchs a weak alkai

A

dark green

22
Q

what color does universal indicator go when it touchs a weak acid

A

light orange or yellow

23
Q

what color does universal indicator go when it touchs neutral substance

A

green

24
Q

what a use of acids

A

food preservatives

chemistry 2 term 1 1/2 year 8 (6 decks)

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