Question

What is the valency of :-
1. Ammonium
2. Hydroxide
3. Nitrate
4. Hydrogen carbonate
5. Carbonate
6. Sulphite
7. Sulphate
8. Phosphate
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Answer 1

Answer:

Ammonium: The chemical formula of ammonium ion is [NH4]+. The valency is +1 as it has one free electron on the central atom.

Hydroxide: The 'valency' of the OH ion is -1. ... The hydroxide ion (OH) is made up of one negatively charged oxygen anion, which has a charge of 2-, and one positively charged hydrogen cation, which has a charge of 1+.

Nitrate: NO3 (Nitrate ion) has three oxygen atoms and one nitrogen atom. Nitrogen belongs to group -15 in the periodic table and it forms bonds with three oxygen atoms with +5 charge. Oxygen belongs to the group – 16 in the periodic table, thus it has a valency f -2.

Hydrogen carbonate: Hydrogen gas valency +1 and CO3 has valency -2. ... Hence the valency of HCO3 is -1. Similar us the case with other compounds like P04 having valency -3 , and so on.

Carbonate: The valency of carbonate is two because it can combine with two hydrogen atoms. Carbon with valency 4 forms a double bond with one among the three O atoms and a single bond each with two O– ions. This resulting in carbonate structure.

Sulphite: Valency of Sulphite is -2.

Sulphate: For example, H2SO4 has two hydrogen atoms, so the valency of sulfate is two. Because sulfate can bond with two positive hydrogen atom, its valency is the opposite charge and often expressed as 2-. If no hydrogen-containing compound is available, use a compound with a known valence.

Phosphate: In phosphate ion, there is four oxygen atom. There is one phosphors atom. Net valency of phosphate ion is 8-5=3. ∴ Valency of phosphate ion is 3.

Answer 2

Answer:

1. Ammonium  ⇒  +1
2. Hydroxide  ⇒  -1
3. Nitrate  ⇒  -1
4. Hydrogen carbonate  ⇒  +1
5. Carbonate  ⇒  +2
6. Sulphite  ⇒  -2
7. Sulphate  ⇒  -2
8. Phosphate  ⇒  +3

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