Mole Concept And Molar Masses

molal solution means 1 mole of solute in of water.
Number of moles of solute
Number of moles of solvent
Mole fraction of Solute = 0.01768

Therefore, the correct answer is Option B)

Discover More From Chapter: Some Basic Concepts of Chemistry

To determine how many grams of aluminum sulfate, , are required to make a 10 L solution at 0.5 M concentration, follow these steps:

Step 1: Understand Molarity
Molarity (M) is defined as the number of moles of solute per liter of solution. The formula is:

Given a 0.5 M solution, this means we have 0.5 moles of per liter. For 10 L, we calculate:

Step 2: Calculate Moles of

Step 3: Convert Moles to Grams
Using the molar mass of , which is 342 g/mol, convert the moles to grams:

Substitute the known values:

Conclusion:
1710 grams of are required to make 10 L of a 0.5 M solution.

• Given mass: 22 g
• Molar mass: 44 g/mol