Question

Sau amestecat 20 g de sol de acid sulfuric cu o mega de 3% cu 10 g de sol cu o mega de 5% .care este o mega de sol obtinute.
Va rogg

Answer 1

ms1=20g H2SO4
Cp1=3% (Omega)
ms2=10g 
Cp2=5%
Din Cp1 scoatem md1:
Cp1=md1/ms1*100 =>md1=Cp1*ms1/100=3*20/100=0.6g
Din Cp2 scoatem md2 ==> Cp2=md2/ms2*100=>md2=Cp2*ms2/100=5*10/100=0.5g
mdf=0.6+0.5=1.1g
msf=20+10=30g
Cpf(Omega Final)=mdf/msf*100=1.1/30*100=3.66%