Gravimetrija

Submitted by miina123456 on Thu, 01/23/2014 - 17:05
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Taloženjem sulfatne kiseline iz 25,00 ml rastvora pomoću BaCl nastalo je taloga BaSo4 0,5835 g taloga.Izračunati količinsku koncentraciju rastvora H2SO4? 

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milicaradenkovic - Thu, 01/23/2014 - 17:09

BaCl2+H2SO4------------------>BaSO4+2HCl

n(BaSO4)=m/Mr=0.5835/233=0.0025 mol

n(H2SO4)=n(BaSO4)=0.0025 mol

c(H2SO4)=n(H2SO4)/V=0.0025/0.025=0.1 mol/l

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miina123456 - Thu, 01/23/2014 - 17:12

hvala