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S1 > Unit 1, Chemical reactions > Flashcards

Unit 1, Chemical reactions Flashcards

1
Q

What happens in all chemical reactions?

A

A new substance is formed

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2
Q

State 5 physical properties of metal.

A 
Shiny
Conducts heat
Conducts electricity 
Malleable
Ductile
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3
Q

How would you extract a reactive metal from its ore?

A

electrolysis

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4
Q

How would you extract a somewhat reactive metal from its ore?

A

heat with carbon

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5
Q

How would you extract an unreactive metal from its ore?

A

Heat

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6
Q

Reactive metals form very stable/unstable compounds so are difficult to extract

A

Stable

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7
Q

State different methods of protecting iron for rusting.

A

Painting
Oiling
Sacrificial protection

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8
Q

In sacrificial protection, do you use a more or less reactive metal?

A

more reactive metal

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9
Q

State the four conditions which can be changed to effect the rate of reactions

A

Particle size
Temperature
Concentration
Catalyst

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10
Q

How are more reactive metals stored?

A

in oil

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11
Q

State the general equation for metal with oxygen

A

metal + oxygen → metal oxide

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12
Q

Give uses for some metals.

A

iron → tables,chairs, railing

good and silver → jewellery

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13
Q

Describe the test for hydrogen gas

A

it burns with a pop

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14
Q

Name an example of an ore and the metal it contains

A

malachite→copper carbonate →copper

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15
Q

What is an ore?

A

A naturally occurring compound containing a metal

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16
Q

Describe the reaction of metal with water

A

metal + water → metal hydroxide + hydrogen

17
Q

Balance this chemical equation

Na + Cl2 → NaCl

A

2Na + Cl2 → 2NaCl

18
Q

Write a word equation for the reaction between oxygen and hydrogen forming water

A

oxygen + hydrogen → water

19
Q

Is wool growing on a sheep a chemical or physical reaction?

A

chemical

20
Q

Is water evaporating a chemical or physical reaction?

A

physical

21
Q

State the different signs of a chemical reaction

A

a gas is produced
precipitates
produces heat/cold
colour change

22
Q

What is the general equation for the reaction between metal and acid

A

metal + acid → salt + hydrogen

S1 (3 decks)

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