In an oxidation-reduction reaction, 0.0450 mol of aqueous feso4 (source of fe2+) reacts completely with 120.0 ml of an acidified aqueous solution of kmno4 (source of 5fe2+(aq) + mno4-(aq) + 8h+(aq) → 5fe3+(aq) + mn2+(aq) + 4h2o(ℓ) what is the molarity of the kmno4 solution?

The molarity of the KMnO₄ solution : 0.075 M

Stochiometry in Chemistry learns about chemical reactions mainly emphasizing quantitative, such as calculations of volume, mass, number, which are related to the number of actions, molecules, elements, etc.

In chemical calculations, the reaction can be determined, the number of substances that can be expressed in units of mass, volume, mole, or determine a chemical formula, for example, the substance level or molecular formula of the hydrate.

The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products

From the reaction:

5Fe²⁺ (aq) + MnO₄⁻ (aq) + 8H⁺ (aq) → 5Fe³⁺ (aq) + Mn²⁺ (aq) + 4H₂O (ℓ)

From the reaction equation above, the reaction coefficient shows the mole ratio of reagents and products

mole ratio for Fe²⁺: MnO₄⁻ = 5: 1

mole Fe²⁺ = 0.045

then mole MnO₄⁻:

= 0.045 : 5

= 0.009

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

Where

M = Molarity

n = Number of moles of solute

V = Volume of solution

then :

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Keywords: mole, Fe²⁺, MnO₄⁻, molarity

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