Question

Calculati concentratia solutiei obtinute prin amestecarea a 200 g solutie HCl de c1=10% cu 50 g solutie HCl de c2=36,5%.

Answer 1

ms1=200g
Cp1=10%
ms2=50g
Cp2=36.5%
Cp1=md1/ms1*100 => md1=Cp1*ms1/100=10*200/100 => md1=20g
Cp2=md2/ms2*100 => md2=Cp2*ms2/100=36.5*50/100 => md2=18.25g
mdf=md1+md2=20g+18.25g =>mdf=38.25g
msf=ms1+ms2=200g+50g =>msf=250g
Cpf=mdf/msf*100=38.25/250*100 => Cpf=15.3%. Sper că te-am ajutat