Question

Explain briefly the principle of soda acid fire extinguisher .

Answer 1

Working of Soda- Acid Fire Extinguisher:

The container of soda acid fire extinguisher holds a sodium bicarbonate solution.

The screw-on cap contains a plunger mechanism which is covered by a safety guard. Below the plunger is a glass phial containing sulphuric acid.

When the plunger is struck, the glass phial is broken and the acid and sodium bicarbonate mix together

The resulting chemical reaction produces carbon dioxide gas which pressurises the space above the liquid forcing it out through the internal pipe to the nozzle.(see image)

 

Answer 2

a soda acid fire extinguisher consist of concentrated sulphuric acid and baking soda (soda bicarbonate) .On pressing the knob,the sulphuric acid reacts with soda which forms sodium sulphate and water liberating CO2. this helps in the cutting of oxygen supply and thus extinguishes the fire.
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