General Property Flashcards
(11 cards)
What is the principal ore of lead
Galena pbs
What is the principal ore of lead
Galena pbs
Other ores of lead are what
Cerassite PbCO3 and anglesite PbSO4
What is the method of purifying Gelena
The lead is first roasted in air to give PbO
What happened after the purification of Galena
The PbO is heated in a blast furnace together with coke, limestone and scrap iron
What is the function of limestone and coke in the blast furnace
Limestone helps to form slag which can be tap off separately and coke helps to reduce the lead oxide to metallic lead
What reduce the other Pbs that might still be present in the blast furnace
The iron scrap reduce Pbs to pb
How does lead look
What is it relative density.what is it malleability level
It’s is grayish white
It has a density of 11.3
It is malleable and can be cut by a knife
What is the ductility level
What is it tensile strength level
What is the melting point
What is the conduction level
It is not ductile enough to be drawn into a wire
It’s fairly strong
The melting point is 327.
It’s a good conductor of electricity and heat
What happened when lead is exposed to moist air
Lead in moist air fork PbO,pb(oh)2
PbCO3
How fast does heated lead combine with oxygen
They combine so slowly
