What is the expected osmotic pressure of a 0.5 M NaCl solution at 25 °C?
Practice Questions
1 question
Q1
What is the expected osmotic pressure of a 0.5 M NaCl solution at 25 °C?
12.3 atm
24.6 atm
6.1 atm
3.1 atm
Osmotic pressure (π) can be calculated using the formula π = iCRT. For NaCl, i = 2, C = 0.5 M, R = 0.0821 L·atm/(K·mol), and T = 298 K, resulting in approximately 24.6 atm.
Questions & Step-by-step Solutions
1 item
Q
Q: What is the expected osmotic pressure of a 0.5 M NaCl solution at 25 °C?
Solution: Osmotic pressure (π) can be calculated using the formula π = iCRT. For NaCl, i = 2, C = 0.5 M, R = 0.0821 L·atm/(K·mol), and T = 298 K, resulting in approximately 24.6 atm.
Steps: 8
Step 1: Identify the formula for osmotic pressure, which is π = iCRT.
Step 2: Determine the value of 'i' for NaCl. Since NaCl dissociates into two ions (Na+ and Cl-), i = 2.
Step 3: Identify the concentration (C) of the NaCl solution, which is given as 0.5 M.
Step 4: Use the ideal gas constant (R), which is 0.0821 L·atm/(K·mol).
Step 5: Convert the temperature from Celsius to Kelvin. 25 °C is equal to 298 K (25 + 273).
Step 6: Plug the values into the formula: π = (2)(0.5 M)(0.0821 L·atm/(K·mol))(298 K).
