Question

The concentration of a potassium manganate(VII) solution (KMnO4) is 10 g /l . What is the concentration of this solution in molarity?

Answer 1

Answer: 0.06 M

Step-by-step explanation:

The definition of molarity is:

Molarity (M) = moles (mol) /liters (l)

Step 1: Convert grams of KMnO₄ to moles of KMnO₄.

10 g KMnO₄ x (1 mol KMnO₄/158.03 g KMnO₄) = 0.06328 mol KMnO₄

Step 2: Place the values of moles and liter into the definition of molarity.

M = mol/L

M = 0.06328 mol/1 L

Divide 0.06328 by 1

M = 0.06328

M = 0.06 to correct number of significant figures