Chemical changes Flashcards

1
Q

What do strong acids do in water?

A

Fully ionise and release H+ ions

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2
Q

What does acid strength tell you?

A

What proportion of the acid molecules ionise in water

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3
Q

What does acid+ metal carbonate produce?

A

Salt+ water+ carbon dioxide

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4
Q

What do all metal oxides and metal hydroxides form when reacted with acid?

A

salt and water

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5
Q

How can you make soluble salts from an insoluble base?

A

1) gently warm the acid
2) add insoluble base in excess
3) then filter out the excess
4) gently heat solution using a water bath
Then crystals will start to form

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6
Q

What is the reactivity series?

A
Potassium
Sodium
Lithium
Calcium 
Magnesium
Aluminium 
Carbon
Zinc
Iron
tin
lead
Hydrogen
Copper
silver
gold 
platinum
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7
Q

What does it mean by how high up a metal is in the reactivity series?

A

How reactive it is and how easily they form positive ions

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8
Q

What are the products of the reaction metal+ water?

A

metal+ water= metal hydroxide+ hydrogen

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9
Q

What is oxidation and what is reduction?

A
Oxidation= loss of oxygen/electrons
Reduction= gain of oxygen/electrons
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10
Q

What do metals higher then carbon in the reactivity series have to be extracted by?

A

Electrolysis

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11
Q

What do metals below carbon need to be extracted by?

A

Reduction

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