High School

Describe the preparation of 5.00 L of 0.150 M KMnO4 from the solid reagent.

Answer: Dissolve ________ grams of KMnO4 in water and dilute to 5.00 L in a volumetric flask. (Fill in the blank)

Answer :

Final answer:

To prepare a 5.00 L of 0.150 M KMnO4 solution, you need to dissolve 118.5265 grams of KMnO4 in water and dilute it to 5.00 L in a volumetric flask.

Explanation:

To prepare a 0.150 M KMnO4 solution with a volume of 5.00 L, we need to calculate the mass of KMnO4 required.

First, let's calculate the number of moles of KMnO4 needed using the formula:

moles = concentration × volume

Substituting the given values:

moles = 0.150 M × 5.00 L

Calculating the moles:

moles = 0.750 mol

Next, we can calculate the mass of KMnO4 using the formula:

mass = moles × molar mass

Substituting the values:

mass = 0.750 mol × 158.034 g/mol

Calculating the mass:

mass = 118.5265 g

Therefore, to prepare a 5.00 L of 0.150 M KMnO4 solution, you need to dissolve 118.5265 grams of KMnO4 in water and dilute it to 5.00 L in a volumetric flask.

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