Ionic bonding name - formula problems

Im studying for my exam and I got my own answers I just want to confirm them with someone else, please state the chemical formula for each chemical name

Tin (ii) flouride

Plumbic perbromate

Cesium nitride

Ammonium dihydrogen phosphate

Barium hyposulfite

Mercurous cyanide octahydrate

Sn (II) = Sn^2+
Flouride = F-

SnF2


Plumbic = Pb^4+
perbromate = BrO4^-

Pb(BrO4)4


Cesium ion = Cs+
Nitride = N^3-

Cs3N


ammonium = NH4^+
dihydrogenphosphate = H2PO4^-

NH4H2PO4


barium ion = Ba^2+
hyposulfite = SO2^2-

BaSO2


mercurous = Hg2^2+
cyanide = CN^-
octa = 8

Hg2CN2.8H2O

Hi Ben...
You wrote HYPOsulfite, not sulfite..
hyposulfite is SO2^2-
sulfite is SO3^2-
http://en.wikipedia.org/wiki/H…

Also, you'll note that for mercurous I put Hg2^2+.. There are 2 Hg's each with a charge of 1+
This is how Hg+ exists, as 2 Hg+ together.
http://en.wikipedia.org/wiki/M

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