Question

What are the products formed when magnesium oxide reacts with hydrochloric acid?

• A. Magnesium chloride
• B. Hydrogen gas
• C. Water
• D. Magnesium hydroxide

Answer 1

Answer: (A), (C)

The correct options are
A Magnesium chloride
C Water

A metal oxide reacts with an acid to form its respective metal salt and water. The general form of reaction is given below:

Metal oxide(s) + Acid(aq) $\to$ Salt(aq) + Water(l)

When magnesium oxide reacts with hydrochloric acid, magnesium chloride and water is formed. The reaction involved is:

$\mathrm{MgO}\left(s\right)+2\mathrm{HCl}\left(\mathrm{aq}\right)\to {\mathrm{MgCl}}_2\left(\mathrm{aq}\right)+H_{2}O\left(l\right)$