Here's why:
* KOH is a strong base, meaning it readily donates hydroxide ions (OH-) in solution.
* HCl is a strong acid, meaning it readily donates hydrogen ions (H+) in solution.
When these two solutions are mixed, the hydrogen ions from the acid react with the hydroxide ions from the base to form water (H2O):
H+ + OH- → H2O
The remaining ions, potassium (K+) and chloride (Cl-) form a salt, potassium chloride (KCl):
K+ + Cl- → KCl
Overall reaction:
KOH + HCl → H2O + KCl
The reaction releases heat, making it an exothermic reaction. This is a classic example of an acid-base reaction, where the acid and base neutralize each other, resulting in a salt and water.