The Highest Concentration of Free Hydrogen Ions is Found in

Question

The highest concentration of free hydrogen ions is found in 
A) household ammonia. 
B) lemons. 
C) human blood. 
D) stomach acid.

Accepted Answer

Stomach acid, also known as gastric acid, is highly acidic due to the presence of hydrochloric acid, which dissociates into free hydrogen ions (H+) and chloride ions (Cl-) in solution. This makes the concentration of free hydrogen ions highest in stomach acid compared to the other options listed.