calculate the percent by mass of solute in solution that contains 3.85 g of calcium chloride in 78.5g of water
difference between solution and pure substance
[3.85/(3.85+78.5)] * 100 =
To calculate the percent by mass of solute in a solution, you need to divide the mass of the solute by the total mass of the solution and then multiply by 100.
In this case, the mass of the solute (calcium chloride) is 3.85 g, and the mass of the solvent (water) is 78.5 g.
Step 1: Calculate the total mass of the solution.
The total mass of the solution is the sum of the mass of the solute (3.85 g) and the mass of the solvent (78.5 g).
Total mass of solution = mass of solute + mass of solvent
Total mass of solution = 3.85 g + 78.5 g = 82.35 g
Step 2: Calculate the percent by mass of solute.
Percent by mass = (mass of solute / total mass of solution) * 100
Percent by mass = (3.85 g / 82.35 g) * 100
Percent by mass ≈ 4.68%
Therefore, the percent by mass of calcium chloride in the solution is approximately 4.68%.