What is the osmotic pressure of a solution prepared from 13.7 g of HCl and water to make 0.500 L of solution at 18°C? Assume HCl completely ionizes.Hint: be sure to keep track of units when working this problem.

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Quizplus · Accepted Answer

The osmotic pressure (π) can be calculated using the formula π = iMRT, where i is the van't Hoff factor (2 for HCl, as it ionizes into H+ and Cl-), M is the molarity, R is the ideal gas constant (0.0821 L·atm/mol·K), and T is the temperature in Kelvin (18°C = 291 K). First, calculate the molarity: 13.7 g HCl / 36.46 g/mol = 0.3758 mol; M = 0.3758 mol / 0.500 L = 0.7516 M. Then, π = 2 * 0.7516 M * 0.0821 L·atm/mol·K * 291 K = 35.9 atm.

What Is the Osmotic Pressure of a Solution Prepared from 13.7