Calculation of Mass of KCl Solution

How can we calculate the mass of KCl required to prepare a solution?

Given the volume and concentration of the solution, what formula can we use to determine the mass of KCl needed?

Answer:

To calculate the mass of KCl required, we can use the formula:

Mass (g) = Volume (mL) * Concentration (mg/L) / 1000

Converting the concentration from mg/L to g/L:

Concentration (g/L) = 683.8 mg/L * 1 g / 1000 mg = 0.6838 g/L

Using the formula above, the mass of KCl required is:

Mass (g) = 223.0 mL * 0.6838 g/L = 152.5474 g

When preparing a solution of potassium chloride (KCl), it is important to determine the correct amount of KCl to add based on the desired concentration. In this scenario, a solution with a volume of 223.0 mL and a potassium concentration of 683.8 mg/L or ppm (parts per million) is needed.

By using the formula Mass (g) = Volume (mL) * Concentration (mg/L) / 1000, we can calculate the mass of KCl required. First, we convert the concentration from mg/L to g/L by dividing by 1000. Then, we multiply the volume in mL by the concentration in g/L to get the mass of KCl needed in grams.

For this particular solution, the mass of KCl required is determined to be 152.5474 grams. This precise calculation ensures that the solution will have the correct concentration of potassium and be suitable for its intended use.