不正确；
$m_{水}=ρ_{水}V_{水}=1\ \mathrm {g/cm}^3×50\ \mathrm {cm}^3=50\ \mathrm {g}$
$m_{盐水}=m_{水}+m_{盐}=50\ \mathrm {g}+22\ \mathrm {g}=72\ \mathrm {g}$
$ρ_{盐水}=\frac {m_{盐水} }{V_{盐水}}=\frac {72\ \mathrm {g}}{60\ \mathrm {cm}^3}=1.2\ \mathrm {g/cm}^3$
