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chemistry > Electrochemistry > Flashcards

Electrochemistry Flashcards

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1
Q

Conductors

A

allow an electric current to pass through.

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2
Q

Non-conductors

A

do not allow an electric current to pass through.

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3
Q

examples of conductors

A

metals, graphite, molten ionic compounds, aqueous solutions of ionic compounds, acids and alkalis

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4
Q

examples of non-conductors

A

non-metals, plastics, solid ionic compounds, covalent compounds, aqueous solutions of covalent compounds

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5
Q

electrolyte

A

When an ionic compound melts or dissolves in water the liquid or solution that forms is known as an electrolyte, because the ionic bonds have broken the ions are free to move, electrolytes are conductors. When an electric current passes through an electrolyte it decomposes.

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6
Q

Differences between metallic and electrolytic conduction

A

Mobile electrons carry the electric current through the metal

Mobile ions carry the electric current through the electrolyte

the metal remains unchanged chemically

the electrolyte is chemically changed and decomposed

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7
Q

Strong electrolytes

A

Strong electrolytes are fully ionized when they dissolve in water. Their solutions contain a high concentration of ions

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8
Q

Weak electrolytes

A

Weak electrolytes are partially ionized when they dissolve in water. Their solutions contain a low concentration of ions.

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9
Q

Examples of strong electrolytes

A

Aqueous Solutions of ionic compounds, strong alkalis, strong acids, molten ionic compounds

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10
Q

Examples of weak electrolytes

A

Weak acids, weak alkalis

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11
Q

Pure water in terms of electrolysis

A

is an extremely weak electrolyte

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12
Q

What are non electrolytes

A

Substances which remain as molecules in the liquid state or dissolved in water and therefore they do not contain any ions. Non-electrolytes are non-conductors.

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13
Q

Examples of non electrolytes

A

Kerosene ethanol molten wax, molten covalent substances Solutions of covalent substances

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14
Q

Three main components of an electrolytic cell

A

The electrolyte which which is either a molten ionic compound or a solution containing mobile ions/ an aqueous solution of ionic compounds.

The battery which supplies the electric current

the electrodes which conduct electricity

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chemistry (20 decks)

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