SDG 15 – Life on Land

You will use two methods to estimate the laminar sub-layer thickness in the laboratory flume. The first method is based on the observed dissolution rate of Gypsum bars, and is described below. 

You will estimate the rate of exchange between a water body (the flume) and the overlying air for two volatile compounds, molecular oxygen and chloroform. You will use an oxygen electrode to measure the changing concentration of oxygen, and gas chromatography (GC) to observe the concentration of chloroform.