Calculate the amount of solute needed to make the solution. I can't remember how to set these up.
.50kg of a 18% (m/m) KOH solution
To calculate the amount of solute needed to make a solution, follow these steps:
Step 1: Determine the desired mass of the solution
In this case, the desired mass of the solution is given as 0.50 kg.
Step 2: Determine the concentration of the solute
The concentration is given as 18% (m/m) KOH. This means that for every 100 grams of the solution, there are 18 grams of KOH.
Step 3: Calculate the mass of the solute needed
To calculate the mass of KOH, use the formula:
Mass of KOH = (Concentration of KOH / 100) * Mass of the solution
Plugging in the values, we get:
Mass of KOH = (18 / 100) * 0.50 kg
Mass of KOH = 0.09 kg
So, the amount of solute (KOH) needed to make the 0.50 kg of a 18% (m/m) KOH solution is 0.09 kg.