Match the name of the following compound:   mgso4  · h2omagnesium sulfate monohydratemagnesium (ii) sulfate monohydratemagnesium (ii) sulfate hydratemagnesium sulfate hydrate

number 2 is the answer my friend said

Explanation:

Magnesium sulfate monohydrate

Explanation:

The compound is a salt, we have a metal connected to an ion.

To name a salt, first of all, we put the name of the cation, which is the first elemental in the compound. It is followed by the name of the anion.

In this case, the cation is the Magnesium and the anion is the anion sulfate. When the cation can have more than one oxidation number, we need to put this number in parenthesis, like this:

Iron (II) sulfate (FeSO4)

Iron (III) sulfate (Fe2(SO4)3)

However, magnesium can only have 2 as oxidation number, because it's from family 2 in the periodic table. So it's unnecessary to put this information.

As the salt has water in its structure, it's a hydrated salt, and this information needed to be in its name. Because it has only one molecule of water, we put the name monohydrate.