Advertisements
Advertisements
Question
Name the element in the compound and give the formula of the following compound:
Blue vitriol
Advertisements
Solution
| Element | Element in compound | Formula |
| Blue vitriol | Copper, sulphur, oxygen, hydrogen | CuSO4.5H2O |
APPEARS IN
RELATED QUESTIONS
Write down the formulae of sodium oxide.
What is meant by the term chemical formula?
Write the chemical formula of the Copper nitrate.
Give the formulae of the compounds formed from the following sets of elements :
- calcium and fluorine
- hydrogen and sulphur
- nitrogen and hydrogen
- carbon and chlorine
- sodium and oxygen
- carbon and oxygen
Give the formula and valency of:
cupric ………………… .
Write chemical formula of the sulphate of Aluminium, Ammonium and Zinc.
Correct the following statement:
Molecular formula of water is H2O2
Match the following:
| Column A | Column B |
| (a) Pb(NO3)2 | (i) rotten eggs smell |
| (b) CO2 | (ii) burns with a pop sound |
| (c) (NH4)2Cr2O7 | (iii) the suffocating smell of sulphur |
| (d) HCI | (iv) lime water turns milky |
| (e) NO2 | (v) crackling sound |
| (f) O2 | (vi) residue swells up |
| (g) H2 | (vii) brown gas |
| (i) H2S | (viii) supports combustion |
| (j) SO2 | (ix) fumes with NH3 solution |
What is a chemical formula? What is the significance of a formula?give an example to illustrate?
Write the formula of the following compound:
Potassium bicarbonate
Write the formula of the following compound:
Sodium bisulphite
Write the formula of the following compound:
Aluminium nitrate
Write the formula of the following compound:
Copper [I] chloride
Write the formula of the following compound:
Iron [III] chloride
What do you understand by chemical formula of a compound? What is its significance?
Write the molecular formulae for the following compounds
Iron (III) sulphide
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
Derive the chemical formula for calcium chloride.
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.
