Answer:
Mass = 27.291 g
Explanation:
Given data:
Mass of sodium chloride = ?
Mass of water = 534 g
Molality = 0.875 m
Solution:
Molality:
It is the number of moles of solute into kilogram of solvent.
Formula:
Molality = number of moles of solute / kilogram solvent
Mathematical expression:
m = n/kg
Now we will convert the g into kg.
Mass of water = 534 g× 1kg/1000 g = 0.534 kg
Now we will put the values in formula.
0.875 m = n / 0.534 kg
n = 0.467 mol
Now we will calculate the mass of sodium chloride:
Mass = number of moles × molar mass
Mass = 0.467 mol × 58.44 g/mol
Mass = 27.291 g
