What is the concentration of a solution which contains 0.28g of potassium hydroxide in 100 cm\(^{3}\) of solution [KOH = 56]

Answer Details

To calculate the concentration of a solution, we need to know the amount of solute and the volume of the solution. The given amount of potassium hydroxide is 0.28 g and the volume of the solution is 100 cm\(^{3}\) or 0.1 dm\(^{3}\).
First, we need to calculate the number of moles of potassium hydroxide in the solution by dividing its mass by its molar mass:
Number of moles of KOH = Mass of KOH / Molar mass of KOH
= 0.28 g / 56 g/mol
= 0.005 mol
Then, we can calculate the concentration of the solution in mol dm\(^{-3}\) by dividing the number of moles by the volume of the solution in dm\(^{3}\):
Concentration of KOH solution = Number of moles / Volume of solution
= 0.005 mol / 0.1 dm\(^{3}\)
= 0.05 mol dm\(^{-3}\)
Therefore, the concentration of the solution is 0.05 mol dm\(^{-3}\). is the correct answer.