## Chem 2 Help

**Anonymous**

I have this problem and I am lost

Engrium sulfate has the formula, En2(SO4)3, while sodium nortonite has the formula Na2NtO3. Based on these names and formulas, what would you expect for the formula of engrium nortonate?

I came up with En2NtO3 Does this sound okay?

Martin17| 30 July 2007 - 3:28am## No. The formula En2(SO4)3

No. The formula En

_{2}(SO_{4})_{3}implies that the ion of Engrium is trivalent, ie En^{+3}because SO_{4}^{-2}is bivalent; therefore in a neutral compound 2x3 + 3x-2 = 0. Similarly, the formula Na_{2}(NtO_{3})implies that the nortonate ion is bivalent because sodium has a charge of +1, ie 2x1 + 1x-2 = 0.The correct answer is therefore En

_{2}(NtO_{3})_{3}; the resulting compound is analogous to ceric carbonate Ce_{2}(CO_{3})_{3}.