# How to Calculate Vapour Pressure of Water and NaCl Solution

## What is the vapour pressure of 54g of water to sice 46.62 NaCl has been added, taken 17.11 atm as vapeur pressure of pure water?

1) 34.35 atm

2) 12.83 atm

3) 12.19 atm

4) 91.31 atm

## Final Answer:

To calculate the vapor pressure of a solution with 54g of water and 46.62g of NaCl, we can use the ideal gas law to determine the moles and then calculate the vapor pressure of the solution. The correct answer is option 3) 12.19 atm.

**Explanation:** To calculate the vapor pressure of a solution, we need to take into account the vapor pressure of the solvent (water) and the concentration of the solute (NaCl). According to the information provided, the vapor pressure of pure water is 17.11 atm and 46.62 g of NaCl has been added to 54 g of water. Using the ideal gas law, we can calculate the moles of water and NaCl, and then determine the vapor pressure of the solution. Applying these calculations, the vapor pressure of the solution is 12.19 atm. Therefore, the correct answer is option 3) 12.19 atm.