Q.7 Write the normal composition of urine.

Answer:
The normal composition of urine is shown in the following table:

Table 11.1 Normal Chemical composition of urineĀ 
(source: NASA Contractor Report)

Water 95%
Urea 9.3 g/l
Chloride ions 1.87 g/l
Sodium ions 1.17 g/l
Potassium ions 0.750 g/l
Other ions and compounds
Variable amounts