Question

What mass of NaCl is needed to make up 125 cm³ of a 0.2 M NaCl solution?

Answer 1

$No. of moles =\frac {MV} {1000}=\frac {0.2×125}{1000}$

=$0.025 moles$

$Mass of NaCl =58.5×0.025=1.4625g$