________ is also used in treating excess acidity in soils and lakes where it is often preferred to lime because it does not make the water excessively alkaline.
New cards
2
Limestone
________ consists mainly of calcium carbonate, CaCO3.
New cards
3
lime reacts
The ________ with silica impurities in the iron ore to form calcium silicate, which floats to the top of the molten iron as slag and is removed:
New cards
4
Lime
________ which is calcium oxide, CaO, is manufactured from calcium carbonate by thermal decomposition:
New cards
5
Cement
________ is a hardened, interlocked structure of calcium aluminate (Ca (AlO2) 2 and calcium silicate (CaSiO3)
New cards
6
Limewater
________ is a solution of calcium hydroxide in water, hence it is weakly alkaline.
New cards
7
Flue gas desulphurisation
________ involves spraying jets of slaked lime slurry into acidic sulfur dioxide emissions to reduce pollution by neutralising these gases before they leave the factory chimneys.
New cards
8
CO2
The ________ produced is reduced to carbon monoxide, CO, by coke (almost pure carbon) where it acts as a reducing agent transforming iron ore into iron:
New cards
9
calcium sulfate
Once heated, ________ and water are added which produce cement.
New cards
10
Limestone
________ (calcium carbonate) is used in the manufacture of iron and cement.
New cards
11
Cement
________ is manufactured by heating a mixture of powdered limestone and clay in a rotary kiln.
New cards
12
lime
Slaked ________ (calcium hydroxide) is used in treating acidic soils and neutralising acidic industrial wasted products.
Studied by 2 people
Note 
Flashcard (42)