What mass of KCl is dissolved in 250. mL of a solution that is 4.00 % by mass/volume?
I attempted at the problem, is it 10.0g?
Very good.
4.00 g/100 mL is a 4% solution.
So 250 mL will have
4.00 x (250/100) = 10.0 grams.
To find the mass of KCl dissolved in the solution, you'll need to use the percent by mass/volume and the volume of the solution.
First, convert the percent concentration from a percentage to a decimal:
4.00% = 0.04
Next, use the formula for percent by mass/volume:
Mass of solute (KCl) = Percent by mass/volume × Volume of solution
Mass of KCl = 0.04 × 250 mL
Now, calculate the mass of KCl:
Mass of KCl = 0.04 × 250 mL = 10 g
Therefore, there is 10 grams of KCl dissolved in 250 mL of the solution.
To find the mass of KCl dissolved in the solution, you need to multiply the volume of the solution by the mass/volume percentage. Here's how you can calculate it:
Step 1: Convert the mass/volume percentage to a decimal.
4.00% is equivalent to 0.040 mass/volume.
Step 2: Multiply the volume of the solution by the mass/volume percentage.
Mass = Volume × mass/volume percentage
Mass = 250 mL × 0.040 mass/volume
Mass = 10.0 g
Therefore, the mass of KCl dissolved in 250 mL of the solution is 10.0 grams.