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Chemistry > testing for ions and gases > Flashcards

testing for ions and gases Flashcards

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1
Q

Anna tests chemical X in a flame test. The flame is orange. Which cation is it?

A

sodium

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2
Q

Mary adds sodium hydroxide to solution Y and warm I up. Moist red litmus paper turns blue. Which cation is in Y?

A

ammonium

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3
Q

Isabelle has made a gas. She adds moist litmus paper. The paper turns red and then bleaches. Which gas has she made?

A

chlorine

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4
Q

Henry does a flame test. The colour is red. Which cation is it?

A

lithium

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5
Q

Tina has produced a gas. She tests it with a glowing splint which relights. Which gas has she produced?

A

oxygen

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6
Q

Dr Haywood investigates a salt; The flame test produces a brick red flame. When she adds hydrochloric acid the solution starts to fizz. Which salt is in the solution?

A

calcium carbonate

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7
Q

Mrs Jones adds sodium hydroxide to a salt solution and a green precipitate forms. What is the cation?

A

iron (II) or Fe2+

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8
Q

Copper turns a flame green. Describe another test for copper ions and its outcome.

A

add sodium hydroxide to a solution of the salt. It produces a blue precipitate

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9
Q

Salt Z produces a lilac flame and a white precipitate when acidified barium chloride is added. What is the salt?

A

potassium sulfate

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10
Q

Salt Z produces a lilac flame and a white precipitate when acidified barium chloride is added. What is the name of the precipitate?

A

barium sulfate

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11
Q

Salt P produces an orange flame and a yellow precipitate when acidified silver nitrate is added to a solution of P. What is the name of the salt?

A

sodium iodide

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12
Q

Salt P produces an orange flame and a yellow precipitate when acidified silver nitrate is added to a solution of P. What is the name of the precipitate?

A

silver iodide

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13
Q

Salt G produces a white precipitate when acidified silver nitrate is added to a solution and an orange/brown precipitate when sodium hydroxide is added. What is the symbol formula of this salt?

A

FeCl3

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14
Q

Sodium hydroxide is added to a solution of salt M and when heated it turns red, moist litmus paper blue. When acidified silver nitrate is added to a fresh solution a cream coloured precipitate is made. What is the name of salt M?

A

ammonium bromide

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15
Q

Sodium hydroxide is added to a solution of salt M and when heated it turns red, moist litmus paper blue. When acidified silver nitrate is added to a fresh solution a cream coloured precipitate is made. What is the name of the precipitate?

A

silver bromide

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16
Q

Tommy produces a gas. He thinks it is carbon dioxide. What is the test for CO2 and its positive outcome?

A

add lime water, turns cloudy

17
Q

A salt solution produces a white precipitate when acidified barium chloride is added and it produces an orange/brown precipitate when sodium hydroxide is added. What is the exact name of the salt?

A

iron(III)sulfate

18
Q

Mary produces a gas. Using a lit splint it makes a squeaky pop. Which gas is it?

A

hydrogen

19
Q

Jonah heats up a solution. A moist red litmus paper turns blue. Which gas was given off?

A

ammonia, not ammonium

20
Q

Mark adds sodium hydroxide into a salt solution and a green precipitate is formed. Into a fresh salt solution he adds hydrochloric acid. The solution starts to fizz. What is the exact name of the salt?

A

iron (II) carbonate

21
Q

Mark adds sodium hydroxide into a salt solution and a green precipitate is formed. What is the exact name of the precipitate?

A

iron (II) hydroxide

22
Q

Mark adds sodium hydroxide into a salt solution and a green precipitate is formed. What is the symbol formula of the precipitate?

A

Fe(OH)2

23
Q

Describe the test for copper 2+ ions and its positive outcome

A

add an alkali/hydroxide, blue precipitate forms

24
Q

Describe the test for bromide ions and its positive outcome

A

add acidified silver nitrate, cream precipitate forms

25
Q

Describe the test for carbonate ions and positive outcome

A

add acid, fizzing occurs

26
Q

Describe the test for Fe3+ ions and positive outcome

A

add alkali/hydroxide, orange, brown precipitate forms

27
Q

Describe the test for sulphate ions and positive outcome

A

add acidified barium chloride, white precipitate forms

28
Q

Describe the test for Fe2+ ions and positive outcome

A

add alkali/hydroxide, green precipitate forms

29
Q

Describe the test for iodide ions and positive outcome

A

add acidified silver nitrate, yellow precipitate forms

30
Q

Describe the test for alkenes and positive outcome

A

add bromine water, water decolourises, not: becomes clear!

Chemistry (6 decks)

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