Question

Calculate the mass of sodium phosphate you will need to make a 50 mL of a 0.10 mol/L Na3PO4 solution

Answer 1

Given :Molarity=0.1mol\lit

volume=50ml=0.05L

Molar mass=164g\mol

We know that $Molarity=\tfrac{mass}{molar mass*volume}$

$0.1=\tfrac{mass}{164*0.05}\\ mass=0.82gm$