Do 30g 20% roztworu kwasu, dodano 20g wody. Oblicz stężenie procentowe końcowe.

mr1=30g Cp=20% mH2O=20g     Cp=(ms/mr1)*100% 20%=(ms/30g)*100%/*30 600%=ms*100%/100% ms=6g     mr=mr1+mH2O mr=30g+20g mr=50g   Cp=(6g/50g)*100% cp=600%/50 Cp=12%    

Ja robie do tego taka tavelke  dodam ci w zalaczniuku ;P