Calculate the permanganate activity in an aqueous 0.18 M KMnO4 solution.
To calculate the permanganate activity in a solution, we need to first understand what permanganate activity is. The permanganate activity is a measure of the concentration of the permanganate ion (MnO4-) in a solution.
To calculate the permanganate activity, we can use the formula:
Activity = Concentration × Activity Coefficient
In this case, we are given the concentration of the KMnO4 solution as 0.18 M. The activity coefficient is a dimensionless quantity that accounts for the deviation from ideal behavior in a solution.
Since the activity coefficient is specific to each solution, we need to either look it up in a table or calculate it using an appropriate method, such as the Debye-Hückel equation.
Once we have the activity coefficient, we can plug in the values into the formula to calculate the permanganate activity.