Question

Intravenous, or IV, solutions used in medicine must exert the same osmotic pressure as blood to prevent a net flow of water into or out of the blood cells. The proper concentration for an intravenous NaCl solution is 0.90 g NaCl per 100. mL of solution (sometimes referred to as 0.90 % m/v).

1. If the van't Hoff factor of NaCl is i = 1.8, what is the osmotic pressure of blood at body temperature, 37°C?

Answer 1

7.055 atm

Step-by-step explanation:

T = (273 + 37)K = 310K

The ideal gas constant = 0.0821atm.L/mol.K

Concentration = (0.90g)*(1mol/58.4g/0.100mL) = 0.154mol/L

Molar mass= Concentration*i

Osmotic pressure = Molar mass *the ideal gas constant*T

OP = (0.154)*(1.8)*(0.0821)*(310) = 7.055 atm