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(A-level) Chemistry > General knowledge > Flashcards

General knowledge Flashcards

1
Q

What is the formula of a nitrate ion

A

No3 (-1)

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2
Q

What is the formula of a sulphate ion

A

SO4 (-2)

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3
Q

What is the formula of a phosphate ion

A

PO4 (-3)

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4
Q

what is the formula of a carbonate ion

A

CO3 (-2)

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5
Q

What colour does lithium give off in a flame test?

A

Red

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6
Q

In a flame test, what colour does sodium give off?

A

Yellow

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7
Q

What color does potassium give off in a flame test?

A

Lilac

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8
Q

In a flame test, what colour does calcium give off?

A

Orange/red

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9
Q

In a flame test, what colour does copper give off?

A

Green/blue

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10
Q

What are hydroxide precipitate tests?

A

A chemical test to find the ions in a hydroxide solution by adding sodium.

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11
Q

In a hydroxide precipitate test what colour is the precipitate of iron(II)?

A

Green

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12
Q

In a hydroxide precipitate test what colour is the precipitate of iron(III)?

A

Orange-brown

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13
Q

In a hydroxide precipitate test what colour is the precipitate of copper?

A

Blue

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14
Q

In a hydroxide precipitate test what colour is the precipitate of calcium?

A

White

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15
Q

In a hydroxide precipitate test what colour is the precipitate of zinc?

A

White

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16
Q

How do you tell the difference between calcium and zinc in precipitate tests?

A

Adding excess sodium hydroxide to the zinc will result in a colourless solution of zinc hydroxide.

17
Q

How do you detect sulfate ions?

A

Add a few drops of hydrochloric acid to your solution.

Then add barium chloride. White precipitate will be shown if sulfate ions are present.

18
Q

How do you test for carbonate ions?

A

Add an acid (e.g. HCl) to the solution. If carbonate ions are present, it will bubble.

19
Q

What happens during the reaction when testing for carbonate ions?

A

It will fizz and carbon dioxide is given off

20
Q

How can you test further for carbonate ions?

A

Boil the solution through limewater.

21
Q

How do you detect halide ions?

A

Add a small amount of dilute nitric acid. Then add silver nitrate. If a precipitate forms, halide ions are present.

22
Q

In halide precipitate tests, what colour is the precipitate when the reaction is with chlorine

A

White

23
Q

In halide precipitate tests, what colour is the precipitate when the reaction is with bromine?

A

Cream

24
Q

In halide precipitate tests, what colour is the precipitate when the reaction is with iodine?

A

Yellow

(A-level) Chemistry (7 decks)

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