Q7 of 26 Page 1

(i) Write down the IUPAC name of the following:

[Co(NH3)5Cl]2+


(ii) Write the formula for the following complex:


Potassium tetrachloridonickelate(II).


(i)[Co(NH3)5Cl]2+: Pentaamminechlorocobalt(III) ion


(ii) Potassium tetrachloridonickelate(II): K2[NiCl4]


Co-ordination complexes are named by IUPAC nomenclature as follows: For compound (i), the cobalt Co has oxidation number is +3. So Cobalt(III) is the base name. NH3 is a neutral molecule so it does not contribute to the base name. There are five NH3 ligands so the name starts with pentaammine. Cl- is named as chlorido. The ligands are placed in alphabetical order and is named as Pentaamminechlorocobalt(III) ion. The charge of the ion is +2 because the overall charge of Co+3 and Cl- is +2.


For (ii), tetrachlorido is Cl4 and Nickelate is Ni. The overall charge of tetrachloridonickelate is -2. So, potassium (K+) will be K2 in order to make the ion neutral. The oxidation number of nickel is +2, thus the base name is (II). So the formula is K2[NiCl4].


More from this chapter

All 26 →
5

What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 2/3rd of tetrahedral voids?

 6

Write one similarity and one difference between the chemistry of lanthanoids and that of actinoids.

 8

Write the reagents required in the following reactions :

(i)


(ii)


OR


Arrange the following compounds inn increasing order of their property as indicated :


(i) CH3COCH3, C6H5COCH3, CH3CHO (reactivity towards nucleophilic addition reaction)


(ii) Cl – CH2 – COOH, F – CH2 – COOH, CH3 – COOH


(acidic character)



9

(i) On mixing liquid X and liquid Y, volume of the resulting solution decreases. What type of deviation from Raoult’s law is shown by the resulting solution? What change in temperature would you observe after mixing liquids X and Y ?

(ii) What happens when we place the blood cell in water (hypotonic solution) ? Give reason.