JAMB - Chemistry (1997 - No. 44)
In the diagram above the gas Y could be
hydrogen chloride
oxygen
carbon (IV) oxide
chlorine
คำอธิบาย
- Two gases that can be used in the study of fountain experiment is ammonia gas and hydrogen chloride gas.
- Ammonia dissolves into the water and the pressure in the container drops. As a result, more water is forced into the container from another inlet creating a fountain effect.
- All the hydrogen chloride in the flask dissolves in the water drops from the pipette, creating a vacuum in the flask. Water is then sucked up at great speed from the bowl, creating a spectacular 'fountain' in the flask.