Ba + H2SO4 → BaSO4 + H2 – Balanced equation

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This is an oxidation-reduction (redox) reaction:

2 H^I + 2 e^- → 2 H (reduction)

Ba - 2 e^- → Ba^II (oxidation)

H₂SO₄ is an oxidizing agent, Ba is a reducing agent.

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Reactants:

Ba
- Names: Barium , Ba , Element 56
- Appearance: Yellowish-to-white lustrous solid in various forms
H₂SO₄ – Sulfuric acid
- Other names: Oil of vitriol , Sulfuric acid, concentrated (> 51% and , H2SO4
- Appearance: Clear, colorless liquid ; Odourless colourless oily hygroscopic liquid ; Colorless to dark-brown, oily, odorless liquid. [Note: Pure compound is a solid below 51°F. Often used in an aqueous solution.]

Products:

BaSO₄
- Names: Barium sulfate , Artificial barite , Barite
- Appearance: White crystalline ; Odourless tasteless white or yellowish crystals or powder ; White or yellowish, odorless powder.
H₂
- Names: Dihydrogen , Hydrogen , H2
- Appearance: Odourless colourless compressed gas