Calculate mole fraction of solution made by mixing 46gram alkohol in 360 gram water at given temperature?
To calculate the mole fraction of a solution made by mixing two substances, you need to determine the number of moles of each substance and then use these values to calculate the mole fraction. Here's how you can do it:
1. Determine the molar mass of each substance:
- The molar mass of alcohol (ethanol) is 46 g/mol.
- The molar mass of water is 18 g/mol.
2. Calculate the number of moles of each substance:
- For alcohol: moles of alcohol = mass of alcohol / molar mass of alcohol
moles of alcohol = 46 g / 46 g/mol = 1 mole
- For water: moles of water = mass of water / molar mass of water
moles of water = 360 g / 18 g/mol = 20 moles
3. Calculate the total number of moles in the solution:
- Total moles in the solution = moles of alcohol + moles of water
Total moles in the solution = 1 mole + 20 moles = 21 moles
4. Calculate the mole fraction of alcohol in the solution:
- Mole fraction of alcohol = moles of alcohol / total moles in the solution
Mole fraction of alcohol = 1 mole / 21 moles ≈ 0.0476
Therefore, the mole fraction of the solution made by mixing 46 grams of alcohol in 360 grams of water is approximately 0.0476.