You’ve just started a new job in the laboratory of the Food and Drug Administration. Your supervisor asks you to prepare a 1.50-M solution of aqueous potassium permanganate, KMnO4. What mass of KMnO4 will you need to prepare 500 mL of this solution?

 118.5 grams

Explanation:

Molarity is defined as the number of moles of solute dissolved per liter of the solution.

where,

n= moles of solute

= volume of solution in ml = 500 ml

moles = 0.75

moles of solute =

0.75 =

mass of = 118.5 grams

Thus mass of needed to prepare 500 mL of this solution iis 118.5 grams