Hypochlorhydria, a condition that affects 30% of Spaniards, can cause slow digestion, reflux and other stomach problems.

Do not attempt to perform this demonstration. Small pieces of Solid sodium metal are placed in two different concentrations of two different acids (hydrochloric acid and nitric acid). The sodium ...

Sulfuric acid, H 2 SO 4 (aq), contains sulfate ions ... so stopping them giving an incorrect positive result for chloride ions. Hydrochloric acid, HCl(aq), contains chloride ions.

A cotton swab is dipped into concentrated hydrochloric acid (producing hydrogen chloride gas) while a second on is dipped into concentrated aqueous ammonia (producing ammonia gas). Both cotton swabs ...