ulcers are often caused by an excess of stoma...
ulcers are often caused by an excess of stomach acid. milk of magnesia is often used to soothe the a base an acid an indicator a colloid clear my selection previous
Answer
# Brief Explanations:
Milk of magnesia is \(\ce{Mg(OH)_{2}}\). It can react with stomach acid (\(\ce{HCl}\)) according to the reaction \(\ce{Mg(OH)_{2}+ 2HCl=MgCl_{2}+2H_{2}O}\). Bases react with acids to form salt and water. An acid would not neutralize stomach acid. An indicator is used to show the pH - change (like color - change in the presence of acid or base). A colloid is a type of mixture (like a dispersion of particles in a medium) and has no role in neutralizing acid.
# Answer:
a base