Solutions Used for Intravenous Injections Must Be Isotonic, That Is

Multiple Choice

Solutions used for intravenous injections must be isotonic, that is, exert an osmotic pressure of 6.9 atm. An isotonic saline solution uses sodium chloride as the solute to achieve isotonic conditions. Use this value for the osmotic pressure to estimate the % NaCl by mass in an isotonic saline solution at 37°C (assume the solution has a density of 1.0 g/mL) .

A) 0.40%
B) 0.50%
C) 0.60%
D) 0.80%
E) 0.90%