(a) Giving reasons arrange the following in the decreasing order of ionic mobility : Li^(+), Na^(+), Rb^(+), K^(+) (b) Explain the various reactions that occur in the Solvay process for the manufacture of Na_2CO_3 (c) Potassium carbonate cannot be prepared by Solvay process, why?

(a) Giving reasons arrange the following in the decreasing order of io

1.	(a) Giving reasons arrange the following in the decreasing order of ionic mobility : Li^(+), Na^(+), Rb^(+), K^(+) (b) Explain the various reactions that occur in the Solvay process for the manufacture of Na_2CO_3 (c) Potassium carbonate cannot be prepared by Solvay process, why?
Answer» SOLUTION :`Rb^(2+) gt K^(+) gt NA^(+) gt Li^+` because of lesser hydration of ion as size increases. In other words, hydrated radii of ions decrease as `Li^(+),Na^(+),K^(+),Rb^(+)`. (c) Potassium carbonate cannot be prepared by SOLVAY process because potassium bicarbonate being more soluble than sodium bicarbonate does not get precipitated when `CO_2` is passed through a CONCENTRATED solution of KCl SATURATED with `NH_3`