Do 120g 10% roztworu dodano 30g wody. Oblicz stężenie procentowe po rozcieńczeniu.

mr=120g Cp=10% ms/mr=cp/100% ms=120*10/100 ms=12g mr=mrp+ms mrp=mr-ms mrp=120-12 mrp=108g 108+30=138g mr2=138g.+12g=150g ms/mr=cp/100% 12g/150g=cp/100% cp=ms*100%/mr cp=12g*100%/150g cp=8%