Question

Name three polyatomic ion having -2 charge and derive chemical formulas using them as anion and sodium as cartion ​

Answer 1

Answer:

your polyatomic ions are $SO4^{2-}$ (sulphate), $CO3^{2-}$(carbonate) and $CrO4^{2-}$(chromate)

valency of Na is +1,

so the compounds formed are:

Na2SO4, Na2CO3, Na2CrO4

Answer 2

Answer:

Theee polyatomic ions having -2 charge are-

1)SO4^2-

1)SO4^2-(Sulphate)

1)SO4^2-(Sulphate)2)CO3^2-

1)SO4^2-(Sulphate)2)CO3^2-(Carbonate)

1)SO4^2-(Sulphate)2)CO3^2-(Carbonate)3)CrO4^2-

1)SO4^2-(Sulphate)2)CO3^2-(Carbonate)3)CrO4^2-(Chromate)

Deriving chemical formulas using them as anion and sodium as cation-

1)SO4^2-

1)SO4^2-(Sulphate)

Na2SO4

2)CO3^2-

2)CO3^2-(Carbonate)

Na2CO3

3)CrO4^2-

3)CrO4^2-(Chromate)

Na2CrO4