make easier to read

Author: yoelcortes

docs/tutorial/Distillation.ipynb

@@ -29,7 +29,7 @@
     "\n",
     "The McCabe-Thiele method assumes that for every mole of liquid vaporized, a mole of vapor is condensed (i.e., constant molar overflow). For a two-component system under this assumption, each stage can be solved sequentially using a bubble/dew point calculation and a simple mass balance. This assumption can be relatively good for components with similar heats of vaporitation.\n",
     "\n",
-    "In BioSTEAM, we extend the McCabe-Thiele method for 3 or more componets by assuming the chemicals more volatile than the light key partition to the distillate while chemicals heavier than the heavy key partition to the bottoms product. This can be a good assumption if the non-key chemicals are present in trace amounts.  \n",
+    "In BioSTEAM, we extend the McCabe-Thiele method for 3 or more componets by assuming that chemicals which are more volatile than the light key will partition to the distillate while chemicals which are heavier than the heavy key will partition to the bottoms product. This can be a good assumption if the non-key chemicals are present in trace amounts.  \n",
     "\n",
     "Let's model a distillation column for separating ethanol from beer (e.g., from fermenting ethanol):"
    ]