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Chemisty > Topic 9a > Flashcards

Topic 9a Flashcards

1
Q

Properties of metals

A

High melting and boiling point

Conduct when electrons are free to move

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2
Q

What metals react with water

A

Alkali metals

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3
Q

Metal + water

A

Salt + hydrogen

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4
Q

What metals react with dilute acid

A

Alkali metals

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5
Q

Metal + dilute acid

A

Salt + hydrogen

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6
Q

Electrolyte

A

Substances that give ions when dissolved in water

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7
Q

What determines the size of the voltage in a simple cell

A

How high it is in the electrochemical series

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8
Q

What is the purpose of an ion bridge

A

To complete the curcuit

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9
Q

Direction of electron flow in a cell

A

It goes from the more reactive to the less reactive element

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10
Q

Reaction contains metal and metal ion in solution

A

Displacement reaction

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11
Q

Displacement reaction

A

chemical reaction in which a more reactive element displaces a less reactive element from its compound

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12
Q

Spectator ion

A

Elect that appears both side of an equation

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13
Q

Oxidation

A

Loss of electrons

Gain of oxegen

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14
Q

redeuction

A

gain of electrons

Loss of oxegen

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15
Q

Redox reaction

A

When oxidation and reduction take place

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16
Q

Electrode

A

electrical conductor

17
Q

Hydrogen test

A

Reactive metal + water —-> metal hydroxides + hydrogen

18
Q

Why do electrons flow in a cell

A

Difference of reactivity between 2 metals

19
Q

When graphite is an electrode what direction do electrons flow

A

From graphite to the metal

20
Q

Electrolysis

A

Breaking up of an ionic compounds using electricity

21
Q

What happens to the positive electrode

A

Bubbles with gas

Eg ie if copper chloride was the electrolyte, then the gas produced would be chlorine

22
Q

What happens to the negative electrode

A

Solid forms

Eg copper chloride. Then copper solid would form

23
Q

Electron in equation of diatomics

A

2

24
Q

What can be used in a half-cell

A

Graphite electrode

Chemisty (18 decks)

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