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My Chemistry > Hydrogen > Flashcards

Hydrogen Flashcards

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1
Q

Metal + water = ( for potassium sodium and calcium )

A

Metal hydroxide + hydrogen

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2
Q

Potassium in cold water

A 
It floats
It fizzes
It moves around the surface
It melts into a silvery ball
It burns with a lilac flame
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3
Q

Calcium in cold water

A

It bobs up and down
It fizzes
Not all of the calcium dissolves so it gives us a milky solution

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4
Q

Magnesium reaction with steam

A

Magnesium glows bright white
White solid remains
Colourless gas is collected

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5
Q

Metal + acid =

A

Salt + hydrogen

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6
Q

What is a salt

A

An acid in which the hydrogen has been replaced by a metal

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7
Q

Sulphuric acid

A

H2SO4

____ sulfste

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8
Q

Hydrochloric acid

A

HCl

______ chloride

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9
Q

Nitric acid

A

HNO3

____ nitrate

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10
Q

Why is copper sulphate used to prepare hydrogen

A

It is added to speed up the reaction (catalyst)

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11
Q

Chemical test for water

A

Anhydrous copper sulphate turns from white to blue

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12
Q

Why is anhydrous calcium chloride used in burning hydrogen

A

A drying agent - it removes water

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13
Q

Soluble basic oxides

A 
Dissolve in water to form hydroxides
React with acids to form salts
Do not react with other alkalis
Oxides at the top of the reactivity series
Eg Na2O K2O CaO
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14
Q

Insoluble basic oxides

A 
Do not dissolve in water
React with acids to form salts
Do not react with alkalis 
Low in the reactivity series
Eg copper oxide, iron (|||) oxide, silver oxide
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15
Q

Acidic oxides

A 
Usually dissolve in water to form acids
React with alkalis to form salts
Do not react with other acids 
Non metal oxides
Eg carbon dioxide, sulfur dioxide
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16
Q

Neutral oxides

A

Do not dissolve in water
Do not react with alkalis
Do not react with acids
Eg carbon monoxide

17
Q

How is sulfur dioxide produced

A

By burning fossil fuels such as coal in power stations

S + O2 = SO2

18
Q

Acid rain equation

A

SO2 + H2O = H2SO4

19
Q

What does sulfur dioxide do

A

Affect people with ahimsa

20
Q

What can acid rain cause

A

It attacks structures made of iron
And buildings made of limestone or marble
It can affect lakes
And cause plants and fish to become poisoned

21
Q

What does nitrogen oxide do

A

It is acidic and a cause if acid rain

22
Q

Metal + water =

A

Metal oxide + hydrogen

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