WAEC SSCE - Chemistry - 1996 (Objective)

Question 1 Report

Ammonia gas is suitable for performing the 'Fountain' experiment because the gas is

colourless

a cooling agent

alkaline to litmus

a reducing agent

very soluble in water

Answer Details

Ammonia gas is suitable for performing the 'Fountain' experiment because it is very soluble in water. In the experiment, ammonia gas is passed through water, where it dissolves to form an alkaline solution. The gas bubbles produced rise to the top of the solution, and as more gas bubbles are produced, the solution becomes saturated with the gas. Eventually, the pressure of the gas forces the solution to rise up and out of the container, creating a fountain-like effect. Ammonia gas is preferred for this experiment because of its high solubility in water, which allows for a sufficient amount of gas to dissolve in the solution and produce the necessary pressure for the fountain effect.

Read lesson note on Acids, Bases And Salts (Ghana Only) (WAEC)






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