. Flashcards
Soda-lime glass is made from
- limestone
- sand
- sodium carbonate
Borosilicate glass is made from
Sand and boron trioxide
————- has a higher boiling point than soda-lime glass
Borosilicate glass
Bronze =
Copper + tin
Brass =
Copper + zinc
State the haber process equation.
N2 + 3H2 —> 2NH3
The air is —— % nitrogen.
78
What is the equation for ammonium nitrate
NH3 + HNO3 —> NH4NO3
You can react phosphate rock with
- nitric acid
- sulfuric acid
- phosphoric acid
Reacting nitric acid and phosphate rock produces
- phosphoric acid
- calcium nitrate
Reacting sulfuric acid and phosphate rock produces
- calcium sulfate
- calcium phosphate ( this mixture is known as single superphosphate)
Reacting phosphoric acid and phosphate rock produces
Only Calcium phosphate
( this product can called triple superphosphate)
In the haber process the hydrogen mainly comes from …
Reacting methane with steam to form hydrogen and carbon dioxide
Sewage settles in a settlement tank and undergoes …
Sedimentation. This is when heavier rocks sink to the bottom to produce sludge at the top.
The ——— is removed from the settlement tank and treated by biological aerobic digestion. This is when air is pumped through the water to encourage the break down of organic matter.
effluent
The effluent is removed from the settlement tank and treated by ———-. This is when air is pumped through the water to encourage the break down of organic matter.
biological aerobic digestion
The effluent is removed from the settlement tank and treated by biological aerobic digestion. This is when —————- . This then released back into the environment.
air is pumped through the water to encourage the break down of organic matter
The sludge from the bottom of the settlement tank is removed and put into ———- for anaerobic digestion. This means that it is broken down by bacteria.
large tanks
The sludge from the bottom of the settlement tank is removed and put into large tanks for ———- . This means that it is broken down by bacteria.
anaerobic digestion
The sludge from the bottom of the settlement tank is removed and put into large tanks for anaerobic digestion. This means that …
it is broken down by bacteria
Anaerobic digestion breaks down organic matter in the sludge , releasing methane gas. The mathane gas can be used as a …
energy source and the remaining digested waste can be used as a fertiliser.
Anaerobic digestion breaks down ———- in the sludge , releasing methane gas. The mathane gas can be used as a energy source and the remaining digested waste can be used as a fertiliser.
organic matter
Anaerobic digestion breaks down organic matter in the sludge , releasing ———-. The mathane gas can be used as a energy source and the remaining digested waste can be used as a fertiliser.
methane gas
When calcium is reacted with sodium hydroxide, it produces …
A white precipitate
When copper is reacted with sodium hydroxide, it produces …
A blue precipitate
When iron (II) is reacted with sodium hydroxide, it produces …
Green precipitate
When iron (III) is reacted with sodium hydroxide, it produces …
A brown precipitate
When aluminium is reacted with sodium hydroxide, it produces …
White precipitate but redissolves in excess NaOH to form a colourless solution.
When magnesium is reacted with sodium hydroxide, it produces …
White precipitate
To test for sulfate ions :
Drop a couple drops of dilute hydrochloric acid following with a few drops of barium chloride solution. If the test is positive then a white precipitate should form.
