Advertisements
Advertisements
Question
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.
Solution
A soda-acid type of fire extinguisher contains solutions of sulphuric acid and sodium hydrogencarbonate in separate containers.
The working of a soda-acid fire extinguisher is described below:
When the knob of the fire extinguisher is pressed, the sulphuric acid mixes with the sodium hydrogencarbonate solution to produce a substantial quantity of carbon dioxide gas. The carbon dioxide gas forces out as a stream of liquid that falls on the burning substance because of the high pressure within the extinguisher. A blanket of carbon dioxide comes out along with the liquid formed around the burning substance and cuts off the supply of air to the burning substance. When the supply of air is cut off, and the fire gets extinguished.
The reaction involved is given below.
2NaHCO3 + H2SO4 → Na2SO4 + 2H2O + 2CO2
APPEARS IN
RELATED QUESTIONS
10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralise it will be:
What happens when an acid reacts with a metal carbonate? Explain with the help of an example. Write chemical equation of the reaction involved.
Phenolphthalein is a synthetic type of indicator.
Write any four physical properties of acids.
Acids turn blue litmus paper to ______.
Common salt besides being used in kitchen can also be used as the raw material for making
- washing soda
- bleaching powder
- baking soda
- slaked lime
Which of the following statements is not correct?
What are strong and weak acids? In the following list of acids, separate strong acids from weak acids.
Hydrochloric acid, citric acid, acetic acid, nitric acid, formic acid, sulphuric acid.
Vinegar is ______ in taste.
Consider the following salt:
YCl
What would be the pH of the solution if, in YCl, Y is sodium? Give a reason for your answer.
