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Chemistry-electrolysis > Electrolysis > Flashcards

Electrolysis Flashcards

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1
Q

A lithium ion, Li+, has two electrons. How can you turn it back into an atom?

A

If it gains 1 electron

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2
Q

To balance a + you have to?

A

Gain electrons

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3
Q

To balance a - you have to?

A

Lose electrons

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4
Q

How does the Br- ion become an atom.

A

By losing one electron

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5
Q

Oxidation takes place at the?

A

Anode

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6
Q

Reduction takes place at the?

A

Cathode

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7
Q

Ions of low reactivity are discharged instead of?

A

H+

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8
Q

H+ is discharged instead of?

A

High reactivity metals

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9
Q

Halide ions are discharged instead of?

A

OH- ions

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10
Q

OH- ions are discharged instead of?

A

Other negative ions

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11
Q

These negative ions include.

A

NO3- SO42- CO32-

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12
Q

When in a solution, all ions will contain?

A

OH- and H+

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13
Q

Only thing that make solutions acidic is?

A

H+

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14
Q

Only thing that makes solutions alkaline is?

A

OH-

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15
Q

Explain test for hydrogen?

A

The squeaky pop test. Put a lit splint at the end of the test tube and listen for a squeaky pop.

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16
Q

Explain test for oxygen.

A

Put a blown out splint into a test tube, if it relights then there is oxygen produced.

17
Q

Methyl orange goes which colours in acid and in alkali?

A

It goes red in acid and yellow in alkali

18
Q

What colours does phenophalein go in acid and alkali?

A

It goes colourless in acid and pink in alkali.

19
Q

What piece of apparatus should be used to measure acid for titration?

A

Glass pipette

20
Q

What is the nam given to the method for finding the amount of acid needed to neutralise the solution?

A

Titration

21
Q

If you add litmus paper to chlorine it goes?

A

Red and then it bleaches white.

22
Q

What is electrolysis?

A

Electrolysis is the breaking down of a substance using electricity.

23
Q

What is oxidation in terms of electrons?

A

Loss of electrons

24
Q

What is reduction in terms of electrons?

A

Gain of electrons

25
Q

Where do the positive ions go to.

A

The cathode

26
Q

What are the positive and negative ions called?

A

Cations and anions

27
Q

Where do the negative ions in the electrolyte move toward.

A

The anode

28
Q

Why can molten ionic compounds be electrolysed.

A

Because the ions can move freely.

29
Q

Molten ionic compounds are broken up into?

A

Elements.

30
Q

Write a half equation for molten lead bromide

A

Pb2+ +2e- =Pb

2Br- = Br2 + 2e-

Chemistry-electrolysis (1 decks)

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