Explain the following (a) Al_(2)(SO_(4))_(3), is used as a mordant in textile industry (b) AlCl_(3) 6H_(2)O on over heating over produce anlaydou. AICI_(3) (C) AlCl_(3) in water shows acidity. (d) Why red colour Rousin's sall[Fu(NO)_(2)S]_(2), is diamagnetic. How do you account for the phenomenon.

Explain the following (a) Al_(2)(SO_(4))_(3), is used as a mordant in

1.	Explain the following (a) Al_(2)(SO_(4))_(3), is used as a mordant in textile industry (b) AlCl_(3) 6H_(2)O on over heating over produce anlaydou. AICI_(3) (C) AlCl_(3) in water shows acidity. (d) Why red colour Rousin's sall[Fu(NO)_(2)S]_(2), is diamagnetic. How do you account for the phenomenon.
Answer» Solution :`Al_(2)(SO_(4))_(3) + H_(2)O rarr 2Al(OH)_(3) + 3H_(2)SO_(4)` Because of this hydrolysis of aq. `Al_(2)(SO_(4))_(3)` the fibres when dipped in aq. `Al_(2 (SO_(4))_(3)` solution, `Al(OH)_(3)`, forms on the surface of the fibres. Dye then combine with `Al(OH)_(3)`, to form an insoluble LAKE whichis fast to washing. The process of f ormation of metallic HYDROXIDES on the fibres before dyeing is known as mordanting (B) `2(AlCl_(3) 6H_(2)O) rarr Al_(2)O_(3) + 6HCl + 9H_(2)O ` Because of hydrolysis of `AlCl_(3)` it never produces anhydrous `AlCl_(3)`. (c) `AlCl_(3) + 6H_(2)O 6)]^(+3) + 3Cl^(-)` ` [Al(H_(2)O)_(6)]^(+3) H^(+) ` (d)There is Fe-Fe bond in the molecules