From the substances below, write down the acid formulas: H2O, KCI, HCL.

From the substances below, write down the acid formulas: H2O, KCI, HCL. Make an equation for the reaction of these acids with magnesium oxide.

We are given substances, water, potassium chloride salt and hydrochloric acid. Of these, only hydrochloric acid belongs to acids. It has the chemical formula HCl. Further, on assignment, we carry out its reaction with magnesium oxide.

Magnesium oxide cannot interact with the potassium chloride salt, since magnesium cannot displace potassium from the salt.

MgO + KCl = reaction not possible.
Magnesium oxide reacts with hydrochloric acid to form a magnesium chloride salt and water is released in this reaction. In order to equalize the reaction, we need to put the number two before hydrochloric acid.

MgO + 2 HCl = MgCl2 + H2O.