Notifications
Clear all
Combustion and Flame
1
Posts
2
Users
0
Likes
799
Views
0
25/04/2021 4:01 pm
Topic starter
Draw a labelled diagram to show the construction of soda-acid fire extinguisher and explain its working.
1 Answer
0
25/04/2021 4:04 pm
In the soda-acid fire extinguisher, carbon dioxide is produced by the reaction of sulphuric acid and sodium bicarbonate. The bottle containing sulphuric acid is struck with a knob and the reaction starts.
2NaHCO3 + H2SO4 → Na2SO4 + H2O + 2CO2
Carbon dioxide produce is neither combustible nor supporter of combustible. Being heavier than air it forms a blanket over the fire and cuts off the supply of air. The water formed cools the substance below its ignition temperature.