Acids, Bases-20 PDF - Science Past Paper 2024-25
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This document describes an experiment on preparing a soda-acid fire extinguisher, a chemistry experiment involving acids and bases. The experiment involves mixing sodium hydrogencarbonate solution with dilute sulphuric acid. The experiment produces carbon dioxide, which is used in fire extinguishers. The document also includes diagrams of the setup for the experiment.
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(II) Preparing a soda-acid fire extinguisher The reaction of acids with metal hydrogencarbonates is used in the fire extinguishers which produce carbon dioxide. n Take 20 mL of sodium hydrogencarbonate (NaHCO3) solution in a wash-bottle. n Suspend an ignition tube contain...
(II) Preparing a soda-acid fire extinguisher The reaction of acids with metal hydrogencarbonates is used in the fire extinguishers which produce carbon dioxide. n Take 20 mL of sodium hydrogencarbonate (NaHCO3) solution in a wash-bottle. n Suspend an ignition tube containing dilute sulphuric acid in the wash-bottle (Fig. 2.10). n Close the mouth of the wash-bottle. n Tilt the wash-bottle so that the acid from the ignition tube mixes with the sodium hydrogencarbonate solution below. n You will notice discharge coming out of the nozzle. n Direct this discharge on a burning candle. What happens? Figure 2.10 (a) Ignition tube containing dilute sulphuric acid suspended in a wash-bottle containing sodium hydrogencarbonate, (b) Discharge coming out of the nozzle 36 Science 2024-25
