Why can wet chemical methods provide information about oxidation states in minerals?

Wet chemical methods are effective for determining the oxidation states of cations in minerals because these techniques involve dissolving the mineral sample in an acid or other solvent to create an aqueous solution. Once the mineral is in solution, chemists can employ specific analytical procedures, such as oxidation-reduction (redox) titrations, to quantitatively measure the concentration of different oxidation states of an element, such as distinguishing between ${\text{Fe}}^{2+}$ and ${\text{Fe}}^{3+}$.123

In these redox titrations, a titrant reacts with the dissolved ions in a definite, known proportion. Because the indicator or electrical measurement signals the completion of the reaction based on the specific chemical behavior of the ions present, this approach provides a clear, quantitative assessment of the oxidation states. This capability is a distinct advantage of wet analytical procedures, as obtaining such precise information regarding oxidation states is often more difficult to achieve using instrumental techniques.31