zapremina sircetne kiseline

Submitted by Jecy on Mon, 03/24/2014 - 13:41
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Koliko cm3  dvomolarne sircetne kiseline je potrebno za pripremanje 1 dm 3  4% rastvora sircetne kiseline?

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milicaradenkovic - Mon, 03/24/2014 - 18:02

w(CH3COOH)=4 %

ro(4%)=1.049 g/cm3

mr=V*ro=1000*1.049=1049 g

ms=w*mr=1049*0.04=41.96 g

n=ms/Mr=41.96/60=0.699 mol

V(CH3COOH)=n/c=0.699/2=0.3495 l=349.5 ml odnosno 349.5 cm3