(i) What is meant by promoter? Give an example.
(ii) The solubility product of BaS04 is 1.5 x 10-9. Find out its solubility in pure water. [1]
(iii) What is the discociation constant of 0.1M solution of a week add HA which is 4.5% ionized at 20°C
For the complex -ion of [Fe(CN)6]-3:
(i) Show the hybridization diagrammatically.
(ii) Is it an inner orbital complex or an outer orbital complex?
(iii) State its magnetic property.
(i) Fe3+ = [Ar] 4s0 3d5
∴ Hybridization = d2sp3
(ii) Inner Orbital complex
(iii) Paramagnetic due to one unpaired e-.
Give balanced the chemcial equations for the following:
(i) Chlorine gas is passed through cold, dilute NaOH.
(ii) Sulphur dioxide gas is passed through NaOH solution.
(iii) Zinc is added to sodium agrentocyanide solution.