Magnesium chloride is formed.
Carbon Dioxide
The gas carbon dioxide is released.
Magnesium Carbonate
The products that are formed will be magnesium salt, water and carbon dioxide. Exactly what salt is made depends the acid used. Hydrochloric acid produces magnesium chloride; sulphuric acid produces magnesium sulphate; nitric acid produces magnesium nitrate.
Magnesium carbonate acts as an antacid. Therefore,it neutralises excess of hydrochloric acid in stomach.
It yields HCl+CO2, CO2 is a by product of a neutralization reaction with HCl.HCl (hydrochloric acid) if neutralized (reacted) with NaHC03 (sodium bicarbonate) will yield NaCl (table salt) + H2O (water) + CO2 (carbon dioxide)
carbon dioxide
Calcium carbonate is a base and hydrochloric acid is an acid but their combined pH depends on ther initial concentrations.
This is a complicated titration problem. The volumes are necessary to solve the problem, as well as a Ka or Kb value.
magnesium chloride? LOL
The products are calcium and magnesium chlorides, water and carbon dioxide.
Magnesium Carbonate + Hydrochloric Acid ------> Magnesium Chloride + Water + Carbon Dioxide The previous answer said magnesium hydroxide + carbon dioxide, but then you will have canceled out the chlorine, which due to the law of conservation of mass, is impossible.