Skip to main content
Pearson+ LogoPearson+ Logo
Ch.13 - Solutions & Their Properties
All textbooksMcMurry 8th EditionCh.13 - Solutions & Their PropertiesProblem 118
Chapter 13, Problem 118

What is the osmotic pressure in atmospheres you would expect for each of the following solutions? (a) 5.00 g of NaCl in 350.0 mL of aqueous solution at 50 °C (b) 6.33 g of sodium acetate, CH3CO2Na, in 55.0 mL of aqueous solution at 10 °C

Verified step by step guidance
1
Step 1: Calculate the molarity of the solution. First, determine the number of moles of solute. For NaCl, use its molar mass to convert grams to moles. Similarly, do this for sodium acetate, CH3CO2Na.
Step 2: Convert the volume of the solution from milliliters to liters, as molarity is expressed in moles per liter.
Step 3: Use the formula for molarity (M = moles of solute / liters of solution) to find the molarity of each solution.
Step 4: Apply the formula for osmotic pressure: \( \Pi = iMRT \), where \( i \) is the van 't Hoff factor (2 for NaCl and 1 for sodium acetate), \( M \) is the molarity, \( R \) is the ideal gas constant (0.0821 L·atm/mol·K), and \( T \) is the temperature in Kelvin.
Step 5: Convert the given temperatures from Celsius to Kelvin by adding 273.15, then substitute all known values into the osmotic pressure formula to calculate the osmotic pressure for each solution.
Related Practice
Textbook Question
A solution prepared by dissolving 3.00 g of ascorbic acid (vitamin C, C6H8O6) in 50.0 g of acetic acid has a freez- ing point that is depressed by ΔT = 1.33 °C below that ofpure acetic acid. What is the value of the molal freezing- point-depression constant for acetic acid?
458
views
Textbook Question
A solution of citric acid, C6H8O7, in 50.0 g of acetic acid has a boiling point elevation of ΔT = 1.76 °C. What is the molality of the solution if the molal boilin# g-point-elevation constant for acetic acid is Kb = 3.07 1°C kg2>mol.
797
views
Open Question
What is the normal boiling point in °C of ethyl alcohol if a solution prepared by dissolving 26.0 g of glucose (C6H12O6) in 285 g of ethyl alcohol has a boiling point of 79.1 °C? See Table 13.4 to find Kb for ethyl alcohol.
Textbook Question
What osmotic pressure in mm Hg would you expect for an aqueous solution of 11.5 mg of insulin 1mol. weight = 59902 in 6.60 mL of solution at 298 K? What would the height of the water column be in meters? The density of mercury is 13.534 g/mL at 298 K.
749
views
Textbook Question
Human blood gives rise to an osmotic pressure of approxi-mately 7.7 atm at body temperature, 37.0 °C. What must the molarity of an intravenous glucose solution be to give rise to the same osmotic pressure as blood?
966
views
Textbook Question
13.122 When salt is spread on snow-covered roads at - 2 °C, the snow melts. When salt is spread on snow-covered roads at - 30 °C, nothing happens. Explain.
321
views