<prompt> Rate at which plasma is cleared of solute free water is known as:Free water clearanceBound water clearanceWater clearance rateSolute level clearance  <response>: Free Water Clearance: Is regulated by ADH. It is the rate at which plasma is cleared of solute free water.Free-water clearance CH20 is calculated as the difference between water excretion urine flow rate and osmolar clearance: 