Question

If 1.00 g of KCl is completely dissolved in 24.5 g of water, what is the percent composition (by mass) of the solution that is formed?

Answer 1

3.92%

Step-by-step explanation:

The solution that is formed is of KCl in water. This means that the percent composition by mass is given by the formula:

• Mass of KCl / Mass of Solution * 100%

We now calculate the mass of solution:

• Mass of Solution = Mass of KCl + Mass of Water = 1.00 g + 24.5 g

• Mass of Solution = 25.5 g

Finally we calculate the percent composition:

• 1.00 g / 25.5 g * 100% = 3.92%