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GCSE Chemistry > testing for ions > Flashcards

testing for ions Flashcards

1
Q

a test for ammonium observation (cation)

A

Red litmus paper will turn blue

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2
Q

a test for iron(II) observation (cation)

A

green precipitate produced

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3
Q

a test for iron(III) observation (cation)

A

brown precipitate produced

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4
Q

a test for copper(II) observation (cation)

A

blue precipitate produced

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5
Q

describe a physical test for whether water is pure or not

A
  • measure its boiling point (is it 100 degrees celsius or not)
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6
Q

describe a test for the presence of water using anhydrous copper (II) sulfate

A

goes from white –> blue

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7
Q

flame test 🔥lithium

A

red

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8
Q

flame test 🔥sodium

A

yellow

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9
Q

flame test 🔥potassium

A

lilac

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10
Q

flame test 🔥calcium

A

orange red

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11
Q

flame test 🔥copper

A

blue green

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12
Q

test for halide ions (Cl-, Br-, I-)

A
  • add dilute nitric solution
  • add silver nitrate solution afterwards
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13
Q

Chloride produces (anion test)

A

White precipitate

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14
Q

Bromide produces (anion test)

A

Cream precipitate

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15
Q

Iodine produces (anion test)

A

Yellow precipitate

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16
Q

test for sulfate ions (SO4^2-)

A
  • dilute hydrochloric acid
  • then BaCl2 solution (barium chloride)
17
Q

result for sulfate ions (SO4^2-)

A

a white precipitate will form

18
Q

carbonate ions (CO3^2-) react with dilute acids to form…
This can be tested by….

A
  • react with dilute acids to form carbon dioxide
  • tested with limewater
  • clear to cloudy means a positive result
19
Q

to test for gases:
hydrogen
Lit splint test

A

use a burning splint and hold at the opening of a test tube
produces ‘squeaky pop’ sound

20
Q

Test result for oxygen

A
  • lit splint relights in test tube
21
Q

How to test for water:

A
  • ## anhydrous copper (II) sulfate turns white to blue when the substance is added

GCSE Chemistry (25 decks)

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