nHCl=\(\dfrac{4,48}{22,4}\)=0,2mol
Đổi 500ml H2O=0,5l H2O
Coi Vdd=VH2O
CMddHCl=\(\dfrac{nHCl}{V\text{dd}}\)=\(\dfrac{0,2}{0,5}\)=0,4 M
mHCl=0,2x36,5=7,3g
mH2O=V.D=500.1=500g
=>mdd=7,3+500=507,3g
C%ddHCl=\(\dfrac{mHCl}{m\text{dd}}\)x100%=\(\dfrac{7,3}{507,3}\)x100%=1,44%