Advertisements
Advertisements
Question
Write the formula of the following compound:
Aluminium hydroxide
Solution
Aluminium hydroxide - Al[OH]3 - `"Al"^(3+)["OH"]^(1-)`
APPEARS IN
RELATED QUESTIONS
The element having atomicity 'four' is most likely to be :
An element Z has a valency of 3. What is the formula of oxide of Z ?
If the valency of carbon is 4 and that of sulphur is 2, work out the formula of the compound formed by the combination of carbon with sulphur. What is the name of this compound ?
An element A forms an oxide A2O5.
What will be the formula of chloride of A ?
Give the formula and valency of:
| Aluminate | ______ | ______ |
Give the empirical formula of Acetylene C2H2
Give the empirical formula of Acitic Acid CH3COOH.
Name the element in the compound and give the formula of the following compound:
Blue vitriol
Write the formula of the following compound:
Calcium carbonate
Write the formula of the following compound:
Calcium bisulphite
Write the formula of the following compound:
Zinc chloride
Write the formula of the following compound:
Zinc hydroxide
Write the formula of the following compound:
Aluminium hydroxide
Define the term Relative atomic mass. State why indirect methods are utilised to determine the absolute mass of an atom. Explain in brief the indirect method used.
Find the valency of the element which is underlined in the following formula.
- NaCl
- CO2
- Al (PO4)
- Ba (NO3)2
- CaCl2
Which of the following represents a correct chemical formula? Name it.
BiPO4
Write the molecular formulae for the following compounds
Mercury (II) chloride
Write the molecular formulae for the following compounds
Magnesium (II) acetate
Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (You may use appendix-III).
- Ammonia
- Carbon monoxide
- (Hydrogen chloride
- Aluminium fluoride
- Magnesium sulphide
Play a game for writing formula.
Example 2: A low-cost model for writing formulae: Take empty blister packs of medicines. Cut them in groups according to the valency of the element, as shown in the figure. Now, you can make formulae by fixing one type of ion into other.
For example:
The formula for sodium sulphate:
2 sodium ions can be fixed on one sulphate ion.
Hence, the formula will be Na2SO4.
Do it yourself:
Now, write the formula of sodium phosphate.
