Why does the test tube become cold when ammonium chloride is dissolved

1.	Why does the test tube become cold when ammonium chloride is dissolved in water in a test tube?
Answer» Ammonium chloride, a water-soluble salt of ammonia, is SLIGHTLY acidic as a water-based solution. The acidic component of ammonium chloride (Cl-) PRODUCES hydrogen (H+) ions when dissolved in water. The BASIC component (NH4+) produces hydroxide (OH-) ions when dissolved in water.

Discussion