1) Ammonium phosphate = (NH4)3PO4
Click to see a detailed solution of the formula above.
2) Copper(II) phosphate = Cu3(PO4)2
3) Silver nitride = Ag3N
4) Iron(II) oxide = FeO
5) Lead(II) chloride = PbCl2
6) Chromium sulfide = Cr2S3
7) Iron(III) carbonate = Fe2(CO3)3
8) Zinc hydroxide = Zn(OH)2
9) Barium nitrate = Ba(NO3)2
10) Tin(II) bromide = SnBr2
11) Sodium hydrogen sulfide = NaHS
12) Aluminium sulfide = Al2S3
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Iron(III) sulfate
Copper dichromate
Aluminium hydroxide
Calcium carbonate
Calcium phosphate
Potassium oxide
Lead acetate
Nickel fluoride
Silver carbonate
Calcium sulfite
Lithium nitride
Lead iodide
Aluminium oxide
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Click to hide solution
Step 1 Write the formula for each ion
Ammonium (NH4+)
Phosphate(PO43-)
Step 2 Balance for charge. We have one positive charge and three negative charges. To balance the charge we need three lots of NH4+
Step 3 Write the
formula using subscript and brackets.
(NH4)3PO4
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Ionic
formulae exercises
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On the left is a table of some of the more common ions and their charge. Write the formula of the following compounds. |
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1) Ammonium phosphate 2) Copper(II) phosphate 3) Silver nitride 4) Iron(II) oxide 5) Lead(II) chloride 6) Chromium sulfide 7) Iron(III) carbonate 8) Zinc hydroxide 9) Barium nitrate 10) Tin(II) bromide 11) Sodium hydrogen sulfide 12) Aluminium sulfide Click for solutions Click for more exercises |
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If you found these a little hard here is an exercise that will make it the process more visual and hopefully more clear.
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| Naming ionic formulae | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||