Advertisements
Advertisements
Question
Write the chemical formula of the following compound in a step-by-step manner –
Zinc hydroxide
Advertisements
Solution
Write the formula of
| Zinc hydroxide | Symbol | valency |
| Zinc | \[\ce{Zn}\] | \[\ce{2^+}\] |
| Hydroxide | \[\ce{OH}\] | \[\ce{1^-}\] |
Step I – Write each symbol with its valency.
Positive ion is written first
\[\ce{Zn}^{2+}\] \[\ce{[OH]}^{1-}\]
Step II – Interchange the valencies and ignoring signs.
The Formula is \[\ce{Zn[OH]2}\]
APPEARS IN
RELATED QUESTIONS
Write the molecular formula of the following compounds of Iron (II) sulphide and.
Find the number and names of elements present in them and calculate their molecular masses.
Write the molecular formula for the oxide and sulphide of following elements of Calcium
Write the molecular formulae for the following compounds and name the elements present of Sulphuric acid
The valency of aluminium is 3. Write the valency of other radicals present in the following compounds of Aluminium oxide.
What is variable valency ? Give two examples of elements showing variable valency.
Write the molecular formulae of Iron (II) sulphide.
Write the molecular formulae of Hydrogen sulphate (sulphuric acid).
Write the chemical formula of the following compound in a step-by-step manner –
Copper [I] sulphide
Write the chemical formula of the following compound in a step-by-step manner –
Iron [II] hydroxide
Match the statements – 1 to 10 below with their correct answers from – A to J.
| Column I | Column II |
| 1. Elements having valency of two. | A: Br1− |
| 2. An anion | B: Divalent |
| 3. A gaseous non-metal | C: Reactants |
| 4. A cation. | D: Ammonium |
| 5. The term used for the substances which take part in the chemical reaction | E: Nitric oxide |
| 6. The meaning of the symbol ‘Δ’ over the arrow in a chemical equation. | F: Nitrogen |
| 7. The chemical name for nitrogen monoxide. | G: Zero |
| 8. A radical containing nitrogen and hydrogen only | H: Nitrous oxide |
| 9. The chemical name for dinitrogen oxide | I: Heat required |
| 10. The valency of noble gases | J: K1+ |
