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Chemistry > Topic 4: Chemical Changes > Flashcards

Topic 4: Chemical Changes Flashcards

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1
Q

Strong acids

A

Acids that ionise completely in water i.e. all acid particles dissociate to release H+ ions

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2
Q

Weak acids

A

Acids that do not fully ionise in water i.e. only a small proportion of acid particles dissociate to release H+ ions

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3
Q

pH (2)

A

A measure of the concentration of H+ ions in the solution

Increases by a factor of 10 as pH decreases by 1

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4
Q

Concentration of acid

A

How much acid in a certain volume of liquid

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5
Q

Acid strength

A

What proportion of the acid molecules ionise in water

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6
Q

Acid + Metal Oxides

A

Salt + Water

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7
Q

Acid + Metal Hydroxide

A

Salt + Water

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8
Q

Acid + Metal Carbonate

A

Salt + Water + Carbon Dioxide

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9
Q

SOLUBLE SALTS PRACTICAL

A

-

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10
Q

Reactivity Series

A 
Potassium
Sodium
Lithium
Calcium
Magnesium
Aluminium
 Carbon
Zinc
Iron
 Hydrogen
Copper
Silver
Gold
Platinum
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11
Q

Acid + Metal

A

Salt + Hydrogen

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12
Q

Metal + Water

A

Metal Hydroxide + Hydrogen

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13
Q

Formation of a metal ore

A

Metal + Oxygen –> Metal Oxide

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14
Q

Extraction of metal with carbon

A

Metal Oxide + Carbon –> Metal + Carbon Dioxide

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15
Q

Oxidation

A

Gain of oxygen

Loss of electrons

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16
Q

Reduction

A

Loss of oxygen

Gain of electrons

17
Q

Cathode

A

The negative electrode which the positive ions will move towards

18
Q

Anode

A

The positive electrode which the negative ions will move towards

19
Q

At the cathode…

A

Positive metal or hydrogen ions are reduced to their element

20
Q

At the anode…

A

Negative non-metal ions are oxidised to their element

21
Q

When will hydrogen form at the cathode?

A

When the metal ion forms an metal element that is more reactive than hydrogen

22
Q

What will form at the anode if halides (chloride, bromide and iodide) aren’t present?

A

Hydroxide ions will be attracted to the anode and oxygen and water will form

23
Q

ELECTROLYSIS PRACTICAL

A

-

Chemistry (10 decks)

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