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Submitted by Makbula Sabanadzovic on Sun, 05/17/2015 - 08:29
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Izracunati koliko je sumporne kiseline potrebno za rastvaranje 20 g bakra?

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Marija 96 - Sun, 05/17/2015 - 19:37

Cu+2H2SO4-->CuSO4+SO2+2H2O

n(Cu)=20g/63,55g/mol =0,314mol

n(Cu):n(H2SO4)=1:2

n(H2SO4)=2*0,314mol=0,629mol

m(H2SO4)=61,7g