Answer: magnesium hydroxide
Explanation:
According to Arrhenius concept, a base is defined as a substance which donates hydroxide ions [tex](OH^-)[/tex] when dissolved in water and an acid is defined as a substance which donates hydronium ions [tex](H_3O^+)[/tex] in water.
Magnesium sulfate has chemical formula [tex]MgSO_4[/tex]
Magnesium chloride has chemical formula [tex]MgCl_2[/tex]
Magnesium hydroxide has chemical formula[tex]Mg(OH)_2[/tex]
[tex]Mg(OH)_2(aq)\rightarrow Mg^{2+}(aq)+2OH^-(aq)[/tex]
Magnesium acetate has chemical formula [tex](CH_3COO)_2Mg[/tex]
Thus magnesium hydroxide is a base when dissolved in water, as defined by Arrhenius.
