Question

With the help of a chemical equation, explain how a soda-acid fire extinguisher helps in putting out a fire.

September 27, 2024

Answer

A soda-acid fire extinguisher uses a chemical reaction between sodium bicarbonate (baking soda) and an acid (often sulfuric acid) to produce carbon dioxide gas. When the extinguisher is activated, the acid and baking soda mix, resulting in the following chemical equation:

NaHCO₃(s) + H⁺ (aq) → Na⁺ (aq) + CO₂ (g) + H₂O (l)

Here’s how it works in simple terms:

1. Chemical Reaction: When the acid reacts with baking soda, it produces carbon dioxide gas (CO₂).

2. Displacement of Oxygen: The CO₂ gas is released under pressure, creating a cloud that displaces oxygen around the fire.

3. Fire Suppression: Since fire needs oxygen to burn, by reducing the oxygen supply, the CO₂ helps to smother the flames and extinguish the fire.

💡 Some Related Questions

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