Because sulfur is +6 (6 valence electrons) but there are 4 oxygens at -2 bound to it so its net charge is +6 - 4 x -2 = -2
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The valency of sulfate ion (SO4^2-) is -2 because sulfur contributes a charge of +6 and each oxygen contributes a charge of -2, resulting in a total charge of -2 for the sulfate ion. This allows for the ion to form stable ionic compounds with metals and other cations.
The valency of a sulfate ion is -2, meaning it has a charge of -2 due to the presence of four oxygen atoms and a sulfur atom. This valency allows the sulfate ion to form compounds with metals and other ions through ionic bonding.
The valency of sodium in sodium sulfate is +1, while the valency of sulfate is -2. Therefore, the valency of sodium sulfate as a whole is +2.
The valency of magnesium in magnesium sulfate is +2, as magnesium typically forms ions with a charge of +2. Sulfate (SO4) has a valency of -2 because it usually gains two electrons to achieve a stable octet.
The valency of hydrogen sulfate is -1. It has the chemical formula HSO4-.
The valency of sulfur in ammonium sulfate is 6. This is because each sulfate ion (SO4^2-) contains one sulfur atom with a valency of 6 due to its ability to form 6 covalent bonds by accepting two electrons from each of the four oxygen atoms.