Why does the stability of alkali carbonates increase down the group?

All the carbonates in this group undergo thermal decomposition to the metal oxide and carbon dioxide gas. Down the group, the carbonates require more heating to decompose. The carbonates become more thermally stable down the group.

What is the trend in thermal stability of Group 1 carbonates?

In Group 1, lithium carbonate behaves in the same way – producing lithium oxide and carbon dioxide. The rest of the Group 1 carbonates don’t decompose at Bunsen temperatures, although at higher temperatures they will. The decomposition temperatures again increase as you go down the Group.

What is the trend of stability down the group?

Down the group, the stability of the higher valency decreases.

Why are alkali metal carbonates stable?

As the electropositive character increase down the group, the stability of alkali carbonates increases. Hence more thermal energy required for the decomposition of alkali carbonates down the group. Hence, Rb2CO3 have more thermal stability than others. Q3.

Why do Group 2 carbonates become more stable down the group?

The thermal stability increases as you go down Group 2. This is because the Group 2 ion has lower charge density, and thus distorts the carbonate ion less. The less distorted the carbonate ion is, the more stable it is, and so a higher temperature is required to decompose the carbonate.

Which carbonates are most stable?

The stability of the alkaline earth metal carbonates increases as the basic character of their hydroxides increases down the group since Ba(OH)2 is most basic, therefore,BaCO3 is most stable.

Why does thermal stability of Group 2 carbonates increase down the group?

Why does thermal stability of group 2 carbonates increase down the group?

Which is more stable carbonate or bicarbonate?

Hence the hybrid structure of carbonate is the most stable. The oxygen atoms have partial negative charge. Bicarbonate is a monovalent anion having one carbon 3 oxygen and one hydrogen atom. On deprotonation it forms carbonic acid.

What is the stability of carbonates in Group 2 metals?

Stability of carbonates increases down group I (alkali) and group II (alkaline earth) metals. The carbonate ion has a big ionic radius so it is easily polarized by a small, highly charged cation.

What is the thermal stability of alkali metal hydrides and carbonates?

Thermal stability of alkali metal hydrides and carbonates (1 answer) Closed 2 years ago. From Li to Cs, thermal stability of carbonates increases. From Li to Cs, due to larger ion size, hydration enthalpy decreases.

What is the trend of solubility of alkali and alkaline earth metals?

Both alkali and alkaline earth metals carbonates have opposite trend of solubility in water… ThThe solubility of group 1A metals increases down the group. But those of 11A metals decreases down the group

How does the degree of polarization affect the stability of carbonates?

The degree of polarization of the carbonate ion by the group I cations follow the order: The greater the polarization of the carbonate ion, the easier it is to weaken a carbon-oxygen bond in th Stability of carbonates increases down group I (alkali) and group II (alkaline earth) metals.