The formula for a sulphate ion is SO42- so the valency of a sulphate ion is -2.
Aluminum has a valency of +3 and sulfate has a valency of -2.
-2
The valency of sulfur is 2.
the valency of silicate ion is 4-
The valency of bromide ion (Br-) is -1.
Na2co3
H2so4-
The sulfate anion has a valency of 2-, i.e. it is SO4^2-
Valency = 2 -
i think its 2
magnesium has a valency of 2
The sulfite ion has a valency of 2.
the valency of silicate ion is 4-