Soda-acid fire extinguishers contain sodium bicarbonate and sulphuricacid. It is the most effective house-hold fire extinguisher. It consists of a strong iron vessel with a side discharge nozzle. ... The sulphuric acidreacts with sodium bicarbonate to form sodium sulphate, water and carbon dioxide.

A soda acid fire extinguisher is a type of fire extinguisher that uses a chemical reaction between baking soda (sodium bicarbonate) and sulfuric acid to produce carbon dioxide gas. This gas is then used to smother the fire by displacing oxygen.



The soda acid fire extinguisher consists of two chambers separated by a thin wall. One chamber contains a solution of sulfuric acid, while the other chamber contains a solution of baking soda. When the extinguisher is activated, a plunger is pushed, which breaks the wall separating the two chambers. This allows the sulfuric acid and baking soda to mix, creating carbon dioxide gas.



Soda acid fire extinguishers are effective against Class B and Class C fires. Class B fires involve flammable liquids, such as gasoline, oil, and alcohol. Class C fires involve electrical equipment, such as appliances and wiring.



Advantages:
- Effective against Class B and Class C fires
- Inexpensive

Disadvantages:
- Messy - the baking soda and sulfuric acid mixture can create a thick foam that is difficult to clean up
- Corrosive - the sulfuric acid can damage surfaces and equipment
- Short shelf life - the sulfuric acid can corrode the metal canister over time, causing the extinguisher to fail when needed.



Soda acid fire extinguishers are a cost-effective option for fighting Class B and Class C fires. However, they are messy and corrosive, and have a relatively short shelf life. It's important to weigh the pros and cons before deciding whether a soda acid fire extinguisher is the right choice for your needs.