the salinity of lake is expressed as mass of salt dissolved in grams per kg of water
Given:
Mass of salt = 14.5g
mass of water =50g = 50 / 1000kg = 0.05kg
Thus salinity will be
salinity = mass of solute / mass of water in kg
salinity = 14.5g / 0.05 kg = 290g / kg
This can also be expressed as parts per thousand or ppt
so salinity is 290 ppt
