Answer: The mass of KOH needed is 28 grams
Step-by-step explanation:
Molarity: It is defined as the number of moles of solute present in one liter of solution.
In this question, the solute is KOH.
The formula used: M = N/V
wb = mass of solute KOH = ?
mb = molar mass of solute KOH = 56 g/mole
V = volume of solution = 250 ml
Molarity = 2.00 M = 2.00 mole/L
Now put all the given values in the above formula, and we get the mass of KOH.
Now put all the given values in the above formula, and we get the mass of KOH.
Therefore, the mass of KOH needed is 28 grams.