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Chemistry > Chemical Changes > Flashcards

Chemical Changes Flashcards

1
Q

Is carbon more or less reactive than iron?

A

More reactive

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2
Q

Silver does not corrode in air or water. What is a word to describe this?

A

Unreactive

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3
Q

Which of the following reacts vigorously with cold water?

Sodium,Magnesium,Zinc,Copper

A

Sodium

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4
Q

…. reactions involve both oxidation and reduction.What is the word?

A

Redox reactions

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5
Q

Acid + metal ->

A

Salt + hydrogen

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6
Q

Acid + metal hydroxide ->

A

Salt + water

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7
Q

Acid + metal carbonate ->

A

Salt + water + carbon dioxide

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8
Q

Acid + metal oxide ->

A

Salt + water

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9
Q

What is the formulae for hydrochloric acid?

A

Hcl

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10
Q

What is the formula for sulphuric acid?

A

H2 SO4

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11
Q

What is the formula of nitric acid?

A

HNO3

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12
Q

Salts that are made with hydrochloric acid are called …

A

Chlorides

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13
Q

Metal + oxygen ->

A

Metal oxide

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14
Q

Metal + water ->

A

Metal hydroxide + hydrogen

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15
Q

Acid + base ->

A

Salt + water

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16
Q

Acid + alkali ->

A

Salt + water

17
Q

Salts that are made with sulphuric acid make…

18
Q

Salts that are made with nitric acid make…

19
Q

Oxidation is where …

A

Electrons are lost or oxygen is gained

20
Q

Reduction is where…

A

Electrons are gained or oxygen is lost

21
Q

What is an alkali?

A

8-14 on the ph scale and turns universal indicator blue

22
Q

What will a base do?

A

It will neutralise an acid

23
Q

What is an ion?

A

An atom with a charge and a full outer shell

24
Q

What is a displacement reaction?

A

Where one reactant is more reactive than the other so the less reactive one is displaced

25
Q

How do you make a soluble salt?
(RPA)

A

Start with a fixed volume of sulfuric acid - limiting reactant
Gently heat the acid until almost boiling
Use a spatula to add small amounts of copper oxide to the acid
Stir the solution with a glass rod
Continue adding copper oxide if the solution continues to be clear blue
Stop adding copper oxide if powder remains after stirring
Use filtration to filter the unreacted copper oxide
Place solution in an evaporating basin and heat gently over a beaker of boiling water until only half the solution is remaining
Leave solution for 24 hours in a cool place for crystals to form
Scrape crystals onto a paper towel and gently pat them dry

Chemistry (8 decks)

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