Definition
Barium chlorate is an inorganic chemical compound with the formula Ba(ClO₃)₂. It appears as a white, crystalline solid and functions as a strong oxidizing agent.
Overview
Barium chlorate belongs to the class of metal chlorates, salts derived from chloric acid (HClO₃). The compound is highly soluble in water, yielding aqueous solutions that retain its oxidizing properties. Because barium ions impart a characteristic green coloration in flames, barium chlorate has historically been employed in pyrotechnic formulations, particularly in fireworks and fireworks primers, where its oxidizing capability facilitates rapid combustion while contributing color. Outside of pyrotechnics, it has limited industrial use due to the availability of safer oxidizers and the toxicity of barium compounds.
Etymology / Origin
The name combines “barium,” derived from the Latin barys meaning “heavy,” referring to the element’s high atomic weight, and “chlorate,” which denotes the anion derived from chlorine (the prefix “chloro‑”) combined with the suffix “‑ate” used for oxyanions containing chlorine in the +5 oxidation state.
Characteristics
| Property | Description |
|---|---|
| Chemical formula | Ba(ClO₃)₂ |
| Molar mass | ≈ 304.23 g·mol⁻¹ |
| Appearance | White crystalline solid |
| Solubility | Readily soluble in water; the resulting solution is strongly oxidizing |
| Oxidizing strength | Strong oxidizer; reacts vigorously with combustible materials |
| Thermal behavior | Decomposes on heating to release oxygen and chlorine‑containing gases, producing barium oxide as a residue |
| Toxicity | Barium salts are toxic if ingested; the compound is also an irritant to skin, eyes, and respiratory tract |
| Safety considerations | Must be stored away from reducing agents, organic material, and heat sources; handled with appropriate protective equipment |
Preparation
Barium chlorate can be synthesized by several laboratory methods, including:
- Acid–base reaction – Reacting barium carbonate (or another basic barium compound) with chloric acid yields barium chlorate and water.
- Double‑displacement – Mixing aqueous solutions of barium chloride with sodium chlorate leads to precipitation of barium chlorate upon cooling and subsequent crystallization.
The resulting crystals are typically purified by recrystallization from water.
Related Topics
- Chlorates – A family of oxyanion salts (ClO₃⁻) known for strong oxidizing properties.
- Barium compounds – Includes barium nitrate, barium carbonate, and barium sulfate, each with distinct uses and hazards.
- Oxidizing agents in pyrotechnics – Substances such as potassium perchlorate, potassium nitrate, and metal chlorates that supply oxygen for rapid combustion.
- Firework chemistry – The study of chemical formulations that produce color, light, and sound in pyrotechnic displays.
Note: The information presented reflects current understanding from reputable chemical literature and safety data sheets.