WAEC - Chemistry (2019 - No. 20)
A sample of air was bubbled into water. The PH of the water slowly changed from 7 to 6. Which of the following gases in the samples caused the change?
carbon(iv)oxide
carbon(ii)oxide
nitrogen
oxygen
Explication
An acid gas is any gaseous compound which, when dissolved in water, will form an acidic solution
The most common acid gases are hydrogen sulfide (H2S) and carbon dioxide (CO2) gases