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Discussion. Magnesium reacts with hydrochloric acid according to the equation: Mg (s) + 2 HCl (aq MgCl 2 (aq) + H 2 (g) This demonstration can be used to illustrate the characteristic reaction of metals with acid, a single replacement reaction, or to demonstrate the generation of hydrogen gas.lace the Petri dish on the overhead projector. Pour hydrochloric acid into the Petri dish to a depth of about 5mm. Turn on the projector and focus it. Using forceps, place the magnesium ribbon into the Petri dish.
Food breakdown occurs in the stomach with the help of hydrochloric acid. Photo Credit stomach image by Alison Bowden from Fotolia.com. Hydrochloric acid, also called HCl, is a clear, highly corrosive liquid. HCl is one of the many chemicals released in our stomach when we eat a meal.The role of hydrochloric acid in the stomach, along with the other gastric juices, is to break down foods and cause the release of enzymes that further aid digestion.HCl also protects the body from illness by killing pathogens commonly found on foods.ood breakdown occurs in the stomach with the help of hydrochloric acid. Photo Credit stomach image by Alison Bowden from Fotolia.com. Hydrochloric acid, also called HCl, is a clear, highly corrosive liquid. HCl is one of the many chemicals released in our stomach when we eat a meal.