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Submitted by Lazar Paunovic on Fri, 09/27/2013 - 20:05
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Opšta diskusija

1. Koliko treba uzeti 12%-ne H2SO4 , a koliko H2O da bi se napravio 1Kg 5%-ne kiseline ? (RESENJE:417g kiseline i 583g vode)

 

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milicaradenkovic - Fri, 09/27/2013 - 21:42

mr1=1 kg a w1=5%

ms1=w1*mr1=1*0.05=0.05 kg

ms2=ms1=0.05 kg

mr2=ms2/w2=0.05/0.12=0.417=417 g H2SO4

m(vode)=1000-417=583 g