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Chemistry > Flashcards For Exam > Flashcards

Flashcards For Exam

1
Q

Dilute acid can help detect

A

Carbonates

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2
Q

Carbonates are substance that contain

A

CO32- ions

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3
Q

Test for carbonates

A

-use a dropping pipette to add a few drops of dilute acid to a test tube containing your mystery substance
-connect this test tube containing limewater

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4
Q

Result for carbonates

A

If carbonates are present, the reaction will release carbon dioxide which will turn the limewater cloudy when it bubbles through it

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5
Q

HCI and barium chloride can help detect

A

Sulfates

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6
Q

Test for sulfates

A

-Use a dropping pipette to add drops of dilute hydrochloric acid
-followed by a couple of drops of barium chloride solution to a test tube containing your mystery solution

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7
Q

Results for sulfates

A

A white precipitate of barium sulfate will form

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8
Q

Nitric acid and silver nitrate can be used to test for

A

Hallides

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9
Q

Test for halides

A

Add a couple of drops of dilute nitric acid (HNO3) followed by a couple of drops of silver nitrate solution (AgNO3) to your mystery solution

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10
Q

If chloride is present, it gives a

A

White precipitate of silver chloride

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11
Q

If bromide is present, it gives a

A

Cream precipitate of silver iodide

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12
Q

If iodide is present, it gives a

A

Yellow precipitate of silver iodide

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13
Q

Flame tests identify

A

Metal ions

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14
Q

Method for testing for metal ions

A

-clean a nichrome or platinum wire loop by rubbing with fine emery paper and then holding it in a blue flame from Bunsen burner
-The Bunsen burner might change color for a bit but once it’s blue again, the loop is clean
-dip the loop into the sample you want to test and put it back in the flame
Record the color of flame

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15
Q

Lithium ions flame color

A

Crimson flame

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16
Q

Sodium flame color

A

Yellow flame

17
Q

Potassium ions flame color

A

Lilac flame

18
Q

Calcium ions flame color

A

Orange red flame

19
Q

copper ions flame color

A

Green flame

20
Q

Calcium ions precipitate color

A

White

21
Q

Copper ions precipitate color

A

Blue

22
Q

Iron(II) ions precipitate color

A

Green

23
Q

Iron(III) ions precipitate color

A

Brown

24
Q

Aluminum ion precipitate color

A

White at first but then redissolves in NaOH to form a colorless solution

25
Q

Magnesium ions precipitate color

A

White

26
Q

Test for chlorine

A

Bleaches damp litmus paper, turning it white

27
Q

Test for oxygen

A

If you put a glowing splint inside a test tube containing oxygen will relight a glowing splint

28
Q

Test for carbon dioxide

A

Bubbling carbon dioxide through an aqueous solution of calcium hydroxide (limewater) causes the solution to turn cloudy

29
Q

Hydrogen

A

Hold a burning splint at the open end of a test tube containing hydrogen, you’ll get a squeaky pop

Chemistry (4 decks)

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