Group 1 Elements

When gas is passed through a brine solution saturated with ammonia, it gives sodium bicarbonate which on drying and heating gives sodium carbonate.

If and are present alongwith , these can also show white precipitate (as precipitate of all these are also white).

is least thermally stable. The thermal stability of carbonates increases down the group i.e from Be to .

$\underset{(523 K)}{BeCO_3}