chemical testing Flashcards

1
Q

MASH

A

metal + acid > salt + hydrogen

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2
Q

OAWS

A

metal oxide + acid > waster + salt

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2
Q

HAWS

A

metal hydroxide + acid > water + salt

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3
Q

CAWSC

A

metal carbonate + acid > water + salt +carbon dioxide

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4
Q

what are the four metal reactions

A

metal
metal oxide
metal hydroxide
metal carbonate

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5
Q

test for ammonia gas

A

damp red litmus paper turns blue

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6
Q

test for carbon dioxide gas

A

bubble for lime water will turn cloudy

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7
Q

test for chlorine gas

A

damp blue litmus paper is bleached

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8
Q

test for hydrogen

A

glowing splint - squeaky pop

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9
Q

test for oxygen

A

lighted splint - ignites

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10
Q

flame test for lithium (Li+)

A

red

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11
Q

flame test for sodium (na+)

A

yellow

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12
Q

flame test for pottasium (K+)

A

lilac

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13
Q

flame test for calcium (Ca2+)

A

orange - red

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14
Q

why are all the metals in flame tests positive ions

A

oxygen is a negative ion - it reacts with oxygen to produce the coloured flame

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15
Q

flame test for copper (Cu2+)

A

blue - green

16
Q

halide reaction for chloride

A

white precipitate

17
Q

halide test for bromide

A

cream precipitate

18
Q

halide test for iodide

A

yellow precipitate

19
Q

chemical test for water

A

anhydrous white copper sulphate turn blue

20
Q

physical test for pure water

A

freeze or boil - if it is the pure then it will be the same as water (100 degrees or o degrees)

21
Q

physical test for normal water

A

boils at or around 100 degrees

22
Q

chemical test for pure water

A

set up a simple circuit with a light bulb.
if bulb does not light up then it is pure water.
if bulb does light up it is likely normal water as normal water can conduct some electricity

23
Q

test for the presence of carbonate ions

A

add hydrochloric acid.
will produce carbon dioxide bubbles.
test for carbon dioxide with lime water.