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Chemistry 11 > C5 Chemical Changes > Flashcards

C5 Chemical Changes Flashcards

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1
Q

What is the reactivity series

A

A list of metals in order of their reactivity
Most reactive at the top eg potassium (K)
Least reactive at the bottom eg platinum (Pt)

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2
Q

Atoms can be made and destroyed in chemical reactions? T or F

A

False

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3
Q

Burning Is a chemical reaction T or F

A

True

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4
Q

Melting and dissolving are chemical reactions T or F

A

False

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5
Q

Cooking food causes it to undergo chemical reactions T or F

A

True

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6
Q

Hydrogen gas reacts with oxygen gas to make water T or F

A

True

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7
Q

The total number of atoms in reactants is always the same as totals number of atoms in the products T or F

A

True

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8
Q

What is the order of reactivity with water and dilute acid

A 
Potassium
Sodium
Lithium
Calcium
Magnesium
Aluminium 
Zinc
Iron
Tin
Lead
Copper
Mercury  
Silver 
gold
Platinum
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9
Q

How do potassium, sodium, lithium, calcium react with water

A

Fizz, giving off hydrogen gas leaving alkaline solution of metal hydroxide

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10
Q

How do magnesium aluminium zinc and iron combine with water

A

Very slow reaction

Magnesium takes several days to collect enough gas to test with a lighted splint making a pop of hydrogen gas

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11
Q

How do tin and lead react with water

A

Slight reaction but only with steam

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12
Q

How do copper silver and go,d react with water

A

No reaction even with steam

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13
Q

How do potassium sodium lithium and calcium react with dilute acid

A

Explode

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14
Q

How do calcium magnesium aluminium zinc and iron react with dilute acid

A

Fizz
Give off hydrogen gas
Form a salt

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15
Q

How do tin and lead react with dilute acid

A

React slowly with warm acid

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16
Q

How do copper silver and gold react with dilute acid,

A

NO reaction

17
Q

List 3 ways to tell a chemical reaction between magnesium and sulphuric acid

A

Fizz
Hydrogen gas given off tested by a pop of a lights splint
A Salt left behind

18
Q

Explain why aluminium can be used outdoors even though it is quite high in the reactivity series

A

It is protected by a layer of aluminium oxide so will not undergo reactions unless oxide layer is removed

Chemistry 11 (11 decks)

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