The following substances are given: magnesium oxide, potassium chloride, iron, lead (II) nitrate, copper (II)

The following substances are given: magnesium oxide, potassium chloride, iron, lead (II) nitrate, copper (II) sulfate, sulfuric acid, iron (III) hydroxide, carbon monoxide (IV). With which of them hydrochloric acid reacts.

The task presents the following substances: magnesium oxide – MgO, potassium chloride – KCl, iron – Fe, bivalent lead nitrate – Pb (NO3) 2, bivalent copper sulfate – CuSO4, sulfuric acid – H2SO4, trivalent iron hydroxide – Fe (OH) 3 , carbon monoxide 4 – CO2.

Let’s consider which of these substances interact with hydrochloric acid.

With magnesium oxide, we get pure magnesium and water.

2 HCl + MgO = Mg2 + H2O

With iron, we get ferrous chloride salt and hydrogen gas.

2 HCl + Fe = FeCl2 + H2

With ferric hydroxide. We get ferric chloride salt and water.

3 HCl + Fe (OH) 3 = FeCl3 + 3 H2O.