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Year 11 Chemistry GCSE > C11 - Electrolysis > Flashcards

C11 - Electrolysis Flashcards

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1
Q

how is a ion formed

A

formed by a gain or loss of electrons

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2
Q

NEED TO KNOW EQUATIONS

A

NO3- = HNO3
SO42- = H2SO4
-OH = H2O
CO32- = H2CO3

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3
Q

what is an ore

A

a naturally occurring solid material from which a metal or valuable mineral can be extracted profitably

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4
Q

what are three uses for aliminium

A
  1. tins, cans
  2. packaging
  3. cars (more expensive ones)
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5
Q

what is the name of the ore aluminium is extracted from

A

bauxite

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6
Q

what is electrolysis

A

the breakdown of decomposition of ionic substance into elements using electricity

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7
Q

what is the positive electrode called

A

anode

P ositive
A node
N egative
I s
C athode

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8
Q

what is the negative electrode called

A

cathode

P ositive
A node
N egative
I s
C athode

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9
Q

what type of element is produced at the cathode

A

metal (positive ion moves here)

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10
Q

what type of element is produced at the anode

A

non-metal

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11
Q

what is oxidisation

A

loss of electrons, gain of oxygen or loss of hydrogen.

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12
Q

what is reduction

A

gain of electrons, loss of oxygen or gain or hydrogen

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13
Q

which solutions contains halide ions

A

group 7 halogens

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14
Q

how do you tests for hydrogen

A

Place a lighted splint in a test tube containing the gas. If the gas is hydrogen, there will be a squeaky pop

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15
Q

how to do test for oxygen

A

a glowing splint is used. The splint is held at the open end of a test tube. The glowing splint relights. If the test tube contains oxygen, the glowing splint will relight.

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16
Q

how do you test for chlorine

A

use damp blue litmus paper. The blue colour will turn to red and then to white it will bleach.

17
Q

what is produced at the positive electrode

A

oxygen

18
Q

what is the order of increasing reactivity

A
  1. potassium
  2. sodium
  3. lithium
  4. calcium
  5. magnesium
  6. aluminium
  7. carbon
  8. zinc
  9. iron
  10. hydrogen
  11. copper
  12. silver
  13. gold

Year 11 Chemistry GCSE (11 decks)

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