Oxygen And Oxides Flashcards
What is a base?
Anything which neutralises an acid
ACID -
ACIDIC -
ACID - Red
ALKALINE - Blue
If water is added to magnesium oxide and some universal indicator, what colour does it turn?
Blue
Test for :
OXYGEN
When glowing splint is put into a container and it delights the. You no oxygen is present
Test for :
Hydrogen
Makes a popping sound when a lit splint in put in a container full of hydrogen
Test for :
Water
When you add anhydrous copper sulphate to water it will turn blue so you no water is present
What are the uses of nitrogen ? (4)
- 78% of the air is nitrogen
- it is fairly unreative
- it is used for packing food eg. Crisps, meat
- used in some cans of beer
What are the solitons for reducing global warming? (4)
- carbon tax
- increase in forestation
- wind farms
- solar panels
What is the formula for making oxygen?
2H O -> O + 2H O
2 2 2 2
Hydrogen peroxide -> oxygen + water
Formula for Making CO ?
2
CaCO + HCL -> Cl + H O + CO
3 2 2 2
Formula for making hydrogen?
Mg + 2HCL -> MgCl + H
2 2
What is the formula for the test for water
CuSO . 5H O CuSO + 5H O
4 2 4 2
What does carbon do in oxygen?
Burns in oxygen to give carbon dioxide
Equation for carbon and oxygen reaction
C + O -> Co
2 2
When the carbon dioxide is produced it is shaken with water; what is formed?
An acidic solution, universal indicator turns red.
% of gases in pure air ?
Nitrogen. N 78%
2
Oxygen. O 21%
2
Argon. Ar. 0.9%
Carbon dioxide Co. 0.04%
2
What could effect air conditions?
The amount of water vapour or small amounts of pollutant gases (So No )
2 2
Heating metals and non metals? Carbon Magnesium Sulphur Iron wool
Carbon- Non-metal
Magnesium- Metal
Sulphur - Non-metal
Iron wool- Metal
Heating metals and non metals?
Reactions with air: Carbon Magnesium Sulphur Iron wool
Carbon- Sparkles/glows
Magnesium- Bright white light
Sulphur - Melted with red beads
Iron wool- Sparkles orange flame
Heating metals and non metals?
Reaction with oxygen: Carbon Magnesium Sulphur Iron wool
Carbon- glowed more brightly
Magnesium- bright white light
Sulphur- burned with a blue flame
Iron wool- burned more brightly
Heating metals and non metals?
Oxide produced: Carbon Magnesium Sulphur Iron wool
Carbon- carbon dioxide - Co
2
Magnesium- magnesium oxide- MgO
Sulphur- sulphur oxide- So
2
Iron wool- iron oxide- Fe O
3 4
Heating metals and non metals?
Test with damp litmus paper? Carbon Magnesium Sulphur Iron wool
Carbon- yellow (acidic)
Magnesium- blue (alkaline)
Sulphur- pink (acidic)
Iron wool- green/green (alkaline)
What is combustion?
Heating substances in oxygen, It produces substances called oxides.
Metal oxides are ……
Alkaline
Non-Metal oxides are ……..
Acidic
The lime water cycle
\_\_\_\_>CaCo\_\_\_\_ Co
| 3 | ~ 2
Co~ | |
2 | \/
| (OH) CaO -Calcium oxide
Ca 2 |
/\----------------|
~ H O
2
