Answer to Question #291007 in Chemistry for lll

Question

To what volume must you make 18 g of table salt if you want a physiological saline solution? (Physiological saline is 0.15 M NaCl.).

 

Answer 1

Solution:

The molar mass of NaCl is 58.44 g/mol

Hence,

Moles of NaCl = (18 g NaCl) × (1 mol NaCl / 58.44 g NaCl) = 0.308 mol NaCl

Molarity of NaCl = Moles of NaCl / Volume of solution

Hence,

Volume of solution = Moles of NaCl / Molarity of NaCl

Volume of solution = (0.308 mol) / (0.15 M) = 2.0533 L = 2.05 L

Volume of solution = 2.05 L

Answer: 2.05 L