Question

what is aquaous tension

Answer 1

Some gases are collected over water in the laboratory. The gas during collection gathers water vapors and become moist. The pressure exerted by this moist gas is, therefore, the sum of the partial pressures of the dry gas and that of water vapors. The partial pressure exerted by the water vapors is called aqueous tension.

Answer 2

Aquaous tension is defined as the partial pressure exerted by water vapour in moist gas. When the gas is collected over the water it becomes moist due to pressure of some quantity of water vapour caused by evaporation. Pressure by moist gas = Pressure by dry gas+ Pressure of water vapour(aquaous tension).