What is the correct name for the compound fecl2•4h2o? iron (iii) dichloride tetrahydrate iron (iv) chloride hydrate iron dichloride hydrate iron tetrachloride hydrate iron (ii) chloride tetrahydrate

The correct name of FeCl₂·4H₂O is iron(II) chloride tetrahydrate.

• Must use Stock system because Fe is a transition metal and can have more than one charge

• 2Cl⁻ needs 1Fe²⁺ to balance charge, ∴ iron(II)

• Cl⁻ is chloride (no multiplying prefix for binary ionic compounds)

• 4 = “tetra” + water = “hydrate” → tetrahydrate

Put it all together and you get iron(II) chloride tetrahydrate (three words)