Question

Which is the correct formula for the compound made when aqueous solutions containing a dissolved magnesium compound and a dissolved chloride compound are mixed?

Answer 1

The correct formula for the compound made when aqueous solutions containing a dissolved Magnesium and Chloride are mixed is Magnesium chloride
`MgCl_2`

Step-by-step explanation:

If we suppose the existence of two components in aqueous solutions containing Magnesium and Chloride. For example: Hydrochloric acid - HCl and Magnesium hydroxide -
`Mg(OH)_2`.

The global reaction would be:

HCl +
`Mg(OH)_2` -->
`MgCl_2` +
`H_2 O`

It means, Hydrochloric acid is neutralized with Magnesium hydroxide to produce Magnesium chloride and Water.

Besides of that, we can analyze the aqueos solution of every componenent:

For Hydrochloric acid:

HCl +
`H_2 O` -->
`H_3O^+` +
`Cl^-`

For Magnesium hydroxide

`Mg(OH)_2` +
`H_2 O` -->
`H_2O-(OH)^-` +
`Mg^+2`

Finally, the ionic compounds will form the salt:

`Mg^+2` +
`Cl^-` ->
`MgCl_2`

Answer 2

it would be MgCl₂ ~ Magnesium Chloride.