A dry gas containing 10.0% NH₃ by volume is contacted with water at 10°C and 1 atm in a single-stage bubble contactor. The effluent liquid and gas streams may be considered to be in equilibrium with each other. A small slip stream taken from the effluent liquid is fed to a continuous densitometer, which indicates that the liquid density is 0.9534g/mL.

(a) Using tabulated data from Perry’s Chemical Engineers’ Handbook (pp. 2-85, 2-87, and 299),¹¹ estimate the percentage of the ammonia in the feed that is removed in the contactor.

(b) Why is it important to maintain the slip stream and densitometer chamber at a known temperature at or below the temperature of the contactor?