Question

pH of human urine is
a. 9
b. 6
c. 4
d. 3

Answer 1

Hint: The pH of urine is neither acidic nor much basic in nature. The urine under the pH 5.0 is acidic while the urine higher than pH 8.0 is considered alkaline or basic.

Complete answer:
Urine is a transparent, slight yellow liquid having a pH of 6, that is, slightly acidic in nature. The pH of urine general lies between 4.5 to 8.2 depending upon the food taken by the individual. It is an aqueous solution which contains ninety-five percent of water. Other constituents of urine are urea, chloride, potassium, sodium, creatinine and several other dissolved ions. They also contain various types of inorganic and organic compounds present in them.
Hence the option (b) is the correct pH of human urine.

Additional information:
- The color of the normal urine in humans ranges from a pale yellow to deep amber color. This is due to the presence of a pigment called urochrome and also on how much the urine is diluted or concentrated. The pigments and other compounds from other foods and medications can also change the urine color.
- The acidic urine that is sometimes occurred in humans is due to prolonged storage in the bladder. This can lead to overgrowth of urea-splitting bacteria inside the bladder. However, this can be maintained by following a vegan diet. The other reason for highly acidic urine can be a result of diuretic therapy, gastric suction and alkali therapy. Low urine pH is seen mostly in the case of metabolic acidosis.
- The human urine has a good source of nitrogen, phosphorus and potassium for plants. They are also used by farmers as the constituents are useful for plants.

Note: The pH level of urine will vary throughout the day and depending on what you have eaten and even on the hardness of the water you are drinking. The pH of urine is an indicator of overall health, as the acidic and basic nature of urine determines the food habit of that individual.