A solution contains .370 mol of isopropanol (C3H7OH) dissolved in 1.700 mol of water. A) What is the mole fraction of isopropanol? B) What is the mass percent of isopropanol? C)The molarity of isopropanol?
mole fraction = moles isopropanol/total moles.
mass percent = mass isopropanol/100 g solution
M = moles isopropanol/L soln.
To find the answers to these questions, we will need to use some formulas and conversion factors. Let's break down each question step by step:
A) What is the mole fraction of isopropanol?
The mole fraction (χ) of a component in a solution is defined as the ratio of the number of moles of that component to the total number of moles of all components in the solution.
The total number of moles in the solution is the sum of the moles of isopropanol (C3H7OH) and water.
Given:
Moles of isopropanol (C3H7OH) = 0.370 mol
Moles of water = 1.700 mol
To calculate the mole fraction of isopropanol (χC3H7OH):
1. Calculate the total moles in the solution:
Total moles = Moles of isopropanol + Moles of water
2. Calculate the mole fraction of isopropanol:
χC3H7OH = Moles of isopropanol / Total moles
B) What is the mass percent of isopropanol?
The mass percent is the ratio of the mass of a component to the total mass of the solution, expressed as a percentage.
To calculate the mass percent of isopropanol:
1. Calculate the total mass of the solution:
Total mass = (Moles of isopropanol x molar mass of isopropanol) + (Moles of water x molar mass of water)
2. Calculate the mass of isopropanol:
Mass of isopropanol = Moles of isopropanol x molar mass of isopropanol
3. Calculate the mass percent of isopropanol:
Mass percent of isopropanol = (Mass of isopropanol / Total mass) x 100
C) What is the molarity of isopropanol?
The molarity (M) of a solute in a solution is defined as the moles of solute divided by the volume of the solution in liters.
To calculate the molarity of isopropanol (C3H7OH):
1. Calculate the volume of the solution in liters:
Volume of solution = Moles of isopropanol + Moles of water
2. Calculate the molarity of isopropanol:
Molarity of isopropanol = Moles of isopropanol / Volume of solution
Now that we have the steps, let's calculate the answers using the given information:
A) Calculate the mole fraction of isopropanol:
Total moles = 0.370 mol (isopropanol) + 1.700 mol (water)
χC3H7OH = 0.370 mol (isopropanol) / Total moles
B) Calculate the mass percent of isopropanol:
Total mass = (0.370 mol (isopropanol) x molar mass of isopropanol) + (1.700 mol (water) x molar mass of water)
Mass of isopropanol = 0.370 mol (isopropanol) x molar mass of isopropanol
Mass percent of isopropanol = (Mass of isopropanol / Total mass) x 100
C) Calculate the molarity of isopropanol:
Volume of solution = 0.370 mol (isopropanol) + 1.700 mol (water)
Molarity of isopropanol = 0.370 mol (isopropanol) / Volume of solution
Please provide the molar masses of isopropanol and water to calculate the final answers.