Finding the charge of a compound

[From: ] [author: ] [Date: 12-03-31] [Hit: ]

How can I figure that PO^4 (Sodium Phosphate) has a -3 charge?-First of all,compounds do not have a charge.They are neutral.You mean radicals, which are a group of atoms that have their own chemical and physical properties.......

When predicting the formula for Sodium Phosphate, I must know the charge of the phosphate..

How can I figure that PO^4 (Sodium Phosphate) has a -3 charge?

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First of all,compounds do not have a charge. They are neutral. You mean radicals, which are a group of atoms that have their own chemical and physical properties. There is no easy way. You must learn the formula, names and valences of of quite a few common radicals.
Like PO4-3, PO3-2 , OH-, NO3- SO2-; CLO3-, ClO4- ClO2-, ClO-, BrO3. - C2H3O2-. C2O42-. SO4^2-

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