3 litres of plasma water, 11 litres of interstitial water, 14 litres of extracellular fluid and 28 litres of intracellular fluid
Total body water:

Sodium accounts for 90% of osmolality but concentration is approximately equal between the intravascular and extravascular compartments
Sodium: 14 mmol/L intracellularly, 142 mmol/L extracellularly
Potassium: 140 mmol/L intracellularly; 4 mmol/L extracellularly

Increases sodium reabsorption and potassium secretion via mineralocorticoid receptors (which are intracellular, nuclear receptors) in the distal tubule that upregulate expression of the basolateral Na/K pump
Upregulates ENaC receptors in the collecting ducts to further increase sodium reabsorption
Increases secretion of hydrogen ions via the intercalated cells of the tubules
Effects take approximately 1 hour and peak at 4 hours
Note also stimulates salt and water reabsorption in the gut, sweat and salivary glands

ADH (peptide hormone): released when hypertonic plasma stimulates hypothalamic osmoreceptors