compute the mole fraction of the solute and solvent in a 15%aquaeons nitric and (HNO3) solution?
Is that 15% w/w or w/v? If w/w, then
15% means 15 g HNO3 in 100 g solution or 15 g HNO3 in (15 g HNO3 + 85 g H2O).
Convert 15g HNO3 to moles. moles = grams/molar mass.
Convert 85 g H2O to moles.
Then XHNO3 = moles HNO3/total moles.
XH2O = moles H2O/total moles.
Post your work if you get stuck.
To compute the mole fraction of the solute (HNO3) and the solvent (water) in a 15% aqueous nitric acid (HNO3) solution, we need to find the number of moles of the solute and solvent present.
Step 1: Determine the mass of the solute (HNO3)
In a 15% solution, the percentage refers to the mass of the solute in 100g of the solution. Let's assume we have 100g of the solution.
Mass of HNO3 = 15% of 100g = 0.15 × 100g = 15g
Step 2: Calculate the number of moles of the solute (HNO3)
The molar mass of HNO3 (nitric acid) is approximately 63.01 g/mol.
Number of moles of HNO3 = Mass of HNO3 / Molar mass of HNO3
Number of moles of HNO3 = 15g / 63.01 g/mol ≈ 0.238 mol
Step 3: Determine the mass of the solvent (water)
Since the solution is 15% nitric acid, the remaining 85% comprises the solvent (water).
Mass of water = 100g - 15g = 85g
Step 4: Calculate the number of moles of the solvent (water)
The molar mass of water (H2O) is approximately 18.02 g/mol.
Number of moles of water = Mass of water / Molar mass of water
Number of moles of water = 85g / 18.02 g/mol ≈ 4.72 mol
Step 5: Calculate the mole fraction of the solute (HNO3)
Mole fraction of HNO3 = Moles of HNO3 / Total moles
Mole fraction of HNO3 = 0.238 mol / (0.238 mol + 4.72 mol) ≈ 0.048
Step 6: Calculate the mole fraction of the solvent (water)
Mole fraction of water = Moles of water / Total moles
Mole fraction of water = 4.72 mol / (0.238 mol + 4.72 mol) ≈ 0.952
Therefore, the mole fraction of the solute (HNO3) is approximately 0.048, and the mole fraction of the solvent (water) is approximately 0.952 in the 15% aqueous nitric acid (HNO3) solution.
To compute the mole fraction of the solute (HNO3) and solvent (water) in a 15% aqueous nitric acid (HNO3) solution, we need to know the amount of solute and solvent in the solution.
However, in the given information, only the concentration is provided as a percentage. To determine the mole fraction, we require the molar concentration or the mass of the solute and solvent.
If you have the molar concentration or the mass of the solute (HNO3) and solvent (water), we can proceed with the calculation.
Here is the general method to compute the mole fraction once you have the required information:
1. Calculate the number of moles of solute (HNO3) and solvent (water).
To calculate the moles of solute, use the following formula:
Moles of Solute = Mass of Solute / Molar Mass of Solute
To calculate the moles of solvent, use the following formula:
Moles of Solvent = Mass of Solvent / Molar Mass of Solvent
2. Calculate the total number of moles in the solution.
Total Moles = Moles of Solute + Moles of Solvent
3. Calculate the mole fraction of the solute and solvent.
Mole Fraction of Solute = Moles of Solute / Total Moles
Mole Fraction of Solvent = Moles of Solvent / Total Moles
Please provide the molar concentration or mass of the solute (HNO3) and solvent (water) so that I can assist you further in calculating the mole fraction.