The main acid in the stomach is hydrochloric acid (HCI). Which chemical equations show a reaction that
occurs when someone takes an antacid? Check all that apply.
HCI + NaOH → NaCl + H2O
2HCI + CaCO3 – CaCl2 + CO2 + H20
2HCI + Mg(OH)2 → MgCl2 + 2H2O
6HCI + 2A1 - 2AlCl3 + 3H2
HCI + NaHCO3 – NaCl + H2O + CO2

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.

answerlinnaeus;

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.