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DC Chemistry > Tests For Gases, Water, Cations, Anions > Flashcards

Tests For Gases, Water, Cations, Anions Flashcards

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1
Q

Test for chlorine

A

Chlorine bleaches damp litmus paper

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2
Q

Test for oxygen

A

Relights a glowing splint

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3
Q

Test for carbon dioxide

A

Turns limewater cloudy

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4
Q

Test for hydrogen

A

Squeaky pop test with a lighted splint

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5
Q

Test for ammonia

A

Turns damp red litmus paper blue

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6
Q

Test for water

A

Add anhydrous copper II sulfate
Turns what to blue.

Anhydrous CuSO4 is white
Hydrated CuSO4 is blue

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7
Q

Flame test for lithium cation. Colour is….

A

lithium is red

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8
Q

Flame test for sodium cation. Colour is…

A

sodium is yellow

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9
Q

Flame test for potassium cation. Colour is…

A

potassium is lilac

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10
Q

Flame test for calcium cation. Colour is…..

A

calcium is brick red

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11
Q

Flame test for copper cation. Colour is…..

A

copper is blue

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12
Q

What physical test can do do to check if water is pure?

A

should boil at exactly 100 deg C

does not conduct electricity

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13
Q

The test for copper and iron cations is what colour precipitate is formed when reacting with sodium hydroxide solution. What are the colours for the following precipitates:

Copper(II)

Iron(II)

Iron(III)

A

Metal ion Reaction with sodium hydroxide solution

Copper(II) Blue precipitate

Iron(II) Green precipitate

Iron(III) Red-brown precipitate

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14
Q

Test for ammonium NH4 cation. Add sodium hydroxide to the solution and test for ammonia gas NH3. `How?

A

turns damp red litmus paper blue

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15
Q

How do we test for carbonate anions CO3 2-

A

Add hydrochloric acid.
CO2 given off
Bubble through limewater - turns cloudy

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16
Q

How do we test for sulfate anions SO4 2-

A

add dilute hydrochloric acid,

then barium chloride solution - produces a white precipitate if SO4 present

17
Q

How do we test for halides (Cl, Br, I) anions?

A

add dilute nitric acid followed by silver nitrate solutions
Chloride - white precipitate of silver chloride
Bromide - cream precipitate of silver bromide
Iodide - yellow precipitate of silver iodide

18
Q

Test to tell if you have an alkane or an alkene?

A

Add bromine water
Alkane - no colour change if no uv light present
Alkene - orange to colourless

DC Chemistry (21 decks)

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