What is the maximum concentration of equimolar solutions of ferrous sulphate and sodium sulphide so that when mixed in equal volumes, there is no precipitation of iron sulphide? (For iron sulphide 'K_sp=6.3 xx 10^(-18)' ).

What is the coordination entity formed when excess of aquéous KCN , iș added to an aqueous solution of copper sulphate? Why is it that no precipitate of copper sulphide is obtained when H_2 S(g) is passed through this solution?

If the concentration of F^(-) in a saturated aq. solutions of CaF_(2) at room temperature is 4 times 10^(-3)molL^(-1) , the K_(sp) of CaF_(2) at the same temperature is

An aresnious sulphides sol carries a negative charge. The maximum precipitating power of this sol is possessed by : K_2 SO_4 CaCl_2 Na_3 PO_4 AlCl_3

A detergent (C_(12)H_(23)SO_(4)^(-)Na^(+)) solution becomes a colloidal sol at a concentration of 10^(-3) M.On an average 10^(13) colloidal particles are present in 1 mm^3 What is the average number of ions are contain in one colloidal particle (micelle)? [Given : N_A = 6 xx 10^(23)]