Basic principles of osmosis
If you want to master the basic principles of osmosis, this video is just the right choice. It precisely discusses osmolarity, osmolality and tonicity. Timeline: 0:00 overview of osmosis ans osmotic pressure 1:30 osmolality and osmolarity 3:24 difference between measured and calculated osmolality 4:27 osmolar gap 5:20 osmolality and tonicity 6:09 hypotonic, isotonic and hypertonic solutions 6:37 calculation of osmolality 8:46 effective osmoles 10:11 summary