Answer : The formula of hexaaquamanganese(II)sulfate is [tex][Mn(H_2O)_6]SO_4[/tex].
Explanation :
Rules for writing formulas of coordination complexes :
The given name of complex is, hexaaquamanganese(ii) sulfate.
In this, the central metal is manganese which is written as Mn and the ligand is water (which is a neutral ligand) is written as [tex]H_2O[/tex] and an anion is sulfate which is written as [tex]SO_4[/tex].
Water is a neutral ligand and sulphate has a charge of -2. As the overall complex is neutral the metal bears a +2 charge which is represented in Roman numeral after the metal.
Therefore, the formula of hexaaquamanganese(II)sulfate is written as [tex][Mn(H_2O)_6]SO_4[/tex].