Give the name and valency of the following polyatomic ions :
Ammonium, Hydroxide, Nitrate, Carbonate, Sulphate, Sulphite, Bicarbonate, Phosphate.
|
Polyatomic ion |
Symbol |
Valency |
|
Ammonium |
(NH4)+1 |
+ 1 |
|
Hydroxide |
(OH)– |
–1 |
|
Nitrate |
(NO3)–1 |
– 1 |
|
Carbonate |
(CO3)–2 |
–2 |
|
Sulphate |
(SO4)–2 |
–2 |
|
Sulphite |
(SO3)–2 |
-2 |
|
Bicarbonate |
(HCO3)–1 |
–1 |
|
Phosphate |
(PO4)–3 |
-3 |
If the calcium salt of a hypothetical anion Z has the molecular formula Ca3Z2. What is the valency of Z and what would be molecular formula of the aluminium salt of Z?
Calcium pyrophosphate is represented by the formula Ca2P2O7. Write the formula of ferric pyrophosphate.
Do all elements have a charged valency? Explain.
The formula of sulphuric acid is H2SO4 and the formula of metal chloride is MCl3. Write the formula of metal sulphate.
