What does a soda-acid type fire extinguisher contain? How does it work? Explain the working of a soda-acid fire extinguisher with the help of a labelled diagram.

A soda-acid fire extinguisher is a type of fire extinguisher that contains two main components: a container of water and a container of sodium bicarbonate (baking soda) mixed with sulfuric acid. The basic principle behind its operation is to mix these two substances to create a chemical reaction that produces carbon dioxide gas, which displaces oxygen and smothers the fire.

Here's how a soda-acid fire extinguisher works, explained step by step:

Container Design: The extinguisher consists of a cylindrical container divided into two chambers by a partition. One chamber holds water, and the other holds the mixture of sodium bicarbonate and sulfuric acid.

Activation: When the extinguisher is activated, it involves inverting the entire unit, causing the partition to break. This action allows the contents of both chambers to come into contact with each other.

Chemical Reaction: Upon contact, the sulfuric acid reacts with the sodium bicarbonate, leading to the following chemical reaction:

Sodium Bicarbonate + Sulfuric Acid → Sodium Sulfate + Carbon Dioxide + Water

The carbon dioxide gas produced is responsible for extinguishing the fire. It displaces the surrounding oxygen, effectively suffocating the flames.

Gas Discharge: As the chemical reaction produces carbon dioxide gas, the pressure inside the extinguisher increases. This pressure forces the water and carbon dioxide mixture out of the extinguisher through a nozzle or hose.

Fire Suppression: The carbon dioxide gas surrounds the fire and reduces the concentration of oxygen in the vicinity. Since fire requires oxygen to sustain itself, the reduction in oxygen concentration prevents the fire from receiving the necessary element to burn. As a result, the fire is extinguished.

Cooling Effect: The water component of the extinguisher also contributes to the fire suppression process by cooling down the materials that are burning. Lowering the temperature helps remove heat energy from the fire triangle (fuel, heat, and oxygen), further aiding in fire extinguishment.

Unfortunately, I can't provide you with a labeled diagram directly in this text-based format, but you can easily find visual representations of a soda-acid fire extinguisher and its components by searching online. Simply search for "soda-acid fire extinguisher diagram" to find images that illustrate its working principles.