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Chemistry C3 > C3.4.1 Analysing substances > Flashcards

C3.4.1 Analysing substances Flashcards

1
Q

What metal ion is present if a crimson flame is produced?

A

Lithium

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2
Q

What metal ion is present if a yellow flame is produced?

A

Sodium

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3
Q

What metal ion is present if a lilac flame is produced?

A

Potassium

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4
Q

What metal ion is present if a brick-red flame is produced?

A

Calcium

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5
Q

What metal ion is present if a green flame is produced?

A

Barium

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6
Q

What ion is present if a green precipitate is formed when sodium hydroxide solution is added?

A

Iron (II)

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7
Q

What ion is present if a red/brown precipitate is formed when sodium hydroxide solution is added?

A

Iron (III)

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8
Q

What ion is present if a blue precipitate is formed when sodium hydroxide solution is added?

A

Copper

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9
Q

What should you do if no precipitate is formed or a white precipitate is formed that doesn’t dissolve in excess sodium hydroxide?

A

Flame test

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10
Q

What ion is present if a white precipitate is formed when sodium hydroxide solution is added that dissolves in excess NaOH?

A

Aluminum

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11
Q

What ion is present if the gas that is given off when hydrochloric acid is added turns lime water cloudy?

A

Carbonate

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12
Q

What ion is present if a white precipitate is formed when nitric acid and silver nitrate are added?

A

Chloride

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13
Q

What ion is present if a cream precipitate is formed when nitric acid and silver nitrate are added?

A

Bromide

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14
Q

What ion is present if a yellow precipitate is formed when nitric acid and silver nitrate are added?

A

Iodide

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15
Q

What ion is present if a white precipitate is formed when hydrochloric acid and barium chloride are added?

A

Sulphate

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16
Q

How do you work out the volumes of acids and alkali needed to react together to produce a neutral solution.

A

Titration and a suitable indicator.

17
Q

What can you do if you know the concentration of one of the reactants?

A

Calculate the concentration of the other reactant using the results from titration.

18
Q

How do you work out the concentration of a reactant with the results from a titration?

A

Convert volumes to dm3

Determine the number of moles of the reactant you know the concentration of.

Work out the number of moles of the other reactant using the balanced equation

Calculate the concentration of the reactant.

Chemistry C3 (9 decks)

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