Calculate the mass percent (m/m) for the solute in 2 grams of KOH in 20.0 grams of H2O? How do I set this up?

To calculate the mass percent (m/m) for the solute in a solution, you need to divide the mass of the solute by the total mass of the solution, and then multiply the result by 100.

To set up the calculation, follow these steps:

1. Identify the solute and the solvent in the given solution. In this case, the solute is KOH (potassium hydroxide) and the solvent is H2O (water).

2. Determine the mass of the solute. In this example, the mass of KOH is given as 2 grams.

3. Determine the mass of the solvent. In this example, the mass of H2O is given as 20.0 grams.

4. Calculate the total mass of the solution by adding the mass of the solute and the mass of the solvent. In this case, the total mass is 2 grams (solute) + 20.0 grams (solvent) = 22.0 grams.

5. Finally, calculate the mass percent (m/m) by dividing the mass of the solute by the total mass of the solution, and then multiplying by 100.

Mass percent (m/m) = (Mass of solute / Total mass of solution) x 100

Plugging in the values from our example:

Mass percent (m/m) = (2 grams / 22.0 grams) x 100

To perform the calculation, divide 2 by 22.0 and multiply the result by 100:

Mass percent (m/m) = 0.0909 x 100 = 9.09%

So, the mass percent of the solute (KOH) in the given solution is 9.09%.