Question

Calculate the mass percentage of benzene if 22 g of benzene is dissolved in 122 g of carbon tetrachloride.

Hint:

Always add solute and solvent masses to get total solution mass before calculating mass percentage.

Answer 1

Step 1: Write the given data.
Mass of benzene (solute) = 22 g
Mass of carbon tetrachloride (solvent) = 122 g

Step 2: Calculate the total mass of the solution.
Total mass of solution = Mass of solute + Mass of solvent
Total mass = 22 g + 122 g
Total mass = 144 g

Step 3: Use the formula for mass percentage.
Mass percentage = (Mass of solute / Mass of solution) × 100

Step 4: Substitute the values.
Mass percentage of benzene = (22 / 144) × 100
= 0.1527 × 100
= 15.27% (approx.)

Final Answer:
The mass percentage of benzene in the solution is 15.27%.