Koliko grama 5% rastvora Na2SO4 se moze pripremiti iz 16.1 g Na2SO4x10H2O
16.1 g----------------------322
x g--------------------------142
x=16.1*142/322=7.1 g Na2SO4
mr=ms/w=7.1/0.05=142 g 5% rastvora
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5% rastvor
16.1 g----------------------322
x g--------------------------142
x=16.1*142/322=7.1 g Na2SO4
mr=ms/w=7.1/0.05=142 g 5% rastvora