What is the oxidation state of Ba in reactant and product?

In compounds, barium (Ba) typically has an oxidation state of +2, as it is an alkaline earth metal. In a chemical reaction where barium is a reactant and remains a part of the product, its oxidation state generally stays at +2 for both the reactant and product. However, it's essential to examine the specific compounds involved to confirm this, as complex interactions might alter its state in rare cases.