sulphur and sulphur compounds
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8 Terms
sources of sulphur
found as an element in the earths crust, in metals ores, fossil fuels
properties of sulphur
brittle, yellow, two allotropes, low melting point, doesnt conduct electricity, insoluble in water, reacts with metals to form sulphides, burns in oxygen to for SO2
extracting sulphur from oil and gas
removed and reacted with oxygen
extracting sulphur from sulphur beds
heated water is pumped into the ground which melts the sulphur, bringing it to the surface
uses of sulphur
contact process, toughening rubber, drugs, sulphur concrete
vulcanising
process of toughening rubber
properties of sulphur dioxide
colourless gas with strong smell, acidic oxide, reducing agent, kills bacteria
contact process
sulphur is burnt in air, sulphur dioxide is mixed with more air, sulphur dioxide is passed over catalyst beds, sulphur trioxide is dissolved in concentrated sulphuric acid, oleum is formed and mixed with water to produce dilute sulphuric acid