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Chemistry GCSE > C12 > Flashcards

C12 Flashcards

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1
Q

flame test for potassium

A

lilac flame

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2
Q

flame test for lithium

A

crimson flame

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3
Q

flame test for sodium

A

yellow flame

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4
Q

flame test for calcium

A

orange flame

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5
Q

flame test for copper

A

green flame

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6
Q

adding sodium hydroxide to metals

A

The hydroxides of metals that have ions with 2+ or 3+ charges are insoluble in water. When you add sodium hydroxide to solutions of these ions, a precipitate of the metal hydroxide forms

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7
Q

aluminium + sodium hydroxide

A

White precipitate formed.
When excess sodium hydroxide is added, the white precipitate of aluminium hydroxide dissolves, showing aluminium ions are present.

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8
Q

calcium + sodium hydroxide

A

White precipitate formed.

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9
Q

magnesium + sodium hydroxide

A

White precipitate formed.

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10
Q

copper(II) + sodium hydroxide

A

Blue precipitate of copper (II) hydroxide appears.

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11
Q

iron (II) + sodium hydroxide

A

Green precipitate of iron (II) hydroxide produced.

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12
Q

iron (III) + sodium hydroxide

A

brown precipitate of iron (III) hydroxide is formed

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13
Q

sulfate formula

A

SO4

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14
Q

sodium hydroxide formula

A

NaOH

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15
Q

test for carbonate ions

A

Add dilute hydrochloric acid to the substance to see if it fizzes.
If it fizzes and the gas produced turns limewater cloudy, the substance contains carbonate ions.

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16
Q

Test for halide ions.

A

Add dilute nitric acid then silver nitrate solution.
Chloride ions give a white precipitate.
Bromide ions give a cream precipitate.
Iodide ions give a pale yellow precipitate.

17
Q

Test for sulfate ions.

A

Add dilute hydrochloric acid and then barium chloride solution.
If a white precipitate froms, sulfate ions are present.

18
Q

Pure substance

A

Made of only 1 element or compound

19
Q

Test for the prescience of water

A

Turns white anhydrous copper surface blue

20
Q

Test for pure water

A

Boiling point exactly 100 degrees Celsius and melting point exactly 0 degrees Celsius

21
Q

Impurities melting point

A

Impurities lower the melting point of a substance and raise its boiling point

22
Q

Formulation

A

A mixture that has been designed to produce a useful product, each chemical in the mixture has a specific purpose, chemicals are mixed in set proportions to give the product its requires properties

23
Q

Paints contain

A 
Paint is a formulation
Contains:
Pigment-colour
Binder- helps paint attach to object
Solvent- helps pigment and binder spread well during painting
24
Q

Formulation e.g.s

A

Fuels, alloys, fertilisers, cleaning agents, paints, medicines, cosmetics and food products.

25
Q

Paper chromatography

A

Mobile phase is solvent

Stationary phase is paper

Chemistry GCSE (10 decks)

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