Calculate the equivalent mass of (i) Sulphate ion (ii) Phosphate ion.

1.	Calculate the equivalent mass of (i) Sulphate ion (ii) Phosphate ion.
Answer» Solution :(i) Sulphate ion (`SO_(4)^(2-)` ). Equivalent mass of Sulphate ion = `("Molar mass of Sulphate ion")/("CHARGE")` `(32+64)/2 = 96/2` = 48 G `eq^(-1)` (ii) PHOSPHATE ion (`PO_(4\|)^(3-)` ). Molar mass of Phosphate ion = `("Equivalent mass of Phosphate ion")/("Charge")` `(31+64)/3 = 95/3 =`31.6 = `31.6 g eq^(-1)`

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