- Introduction to Chemistry and Laboratory Apparatus | Week 15Topics1 Quiz
- Nature of Matter | Week 23Topics1 Quiz
- Separation Techniques I | Week 31Topic1 Quiz
- Separation Techniques II | Week 45Topics1 Quiz
- Particulate Nature of Matter I | Week 55Topics1 Quiz
- Particulate Nature of Matter II | Week 69Topics1 Quiz
- Symbols, Formulae & Oxidation Number | Week 77Topics1 Quiz
- Laws of Chemical Combination | Week 84Topics1 Quiz
- Chemical Equation & Chemical Combination (Chemical Bonding) I | Week 94Topics1 Quiz
- Chemical Combination (Chemical Bonding) II | Week 104Topics1 Quiz
- Chemical Combination (Chemical Bonding) III & Shapes of Covalent Molecules | Week 113Topics1 Quiz
Hydrated Salts are salts containing water of crystallization. The number of water molecules is indicated by mono, di, tri, tetra, penta etc. according to the number of water of crystallization.
In naming the corresponding anhydrous salt i.e without molecules of water, the salt is first named, followed by a full-stop, then the number of water molecules of water is written down. Example:
| IUPAC NAME | HYDRATED SALT |
| Sodium trioxocarbonate (IV) decahydrate | Na2CO3.10H2O |
| Copper(II) tetraoxosulphate (VI) pentahydrate | CuSO4.5H2O |
| Cobalt (II) Chloride hexahydrate | COCl2.6H2O |
Theory Questions
1. Write down the formulae of the following:Â
(i) Ozone
(ii) Hydrogen sulphate
(iii) Magnesium tetraoxosulphate(VI)
(iv)Oxygen molecule
(v) Bromine molecule
2. Calculate the Oxidation number of the underlined elements
(a) H2SO4
(b) CO2
(c) NaH
(d) Cr2O
(e) FeCl2
(f) NaMnO4
3. Give the IUPAC name of the following compounds
(a) MgO
(b) NaSO4
(c) FeO3
(d) Al2O3
4.
(a) Give the symbols of the following elements:
(i) Silicon         Â
(ii) ChlorineÂ
(iii) Silver         Â
(iv) Potassium
(b) Name the elements with the following symbols:
(i) Sn
(ii) Br
(iii) Cr
(iv) Be
