Why does thermal stability of carbonates increase down Group 2?
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.
Why does the thermal stability decreases down the group?
This is due to the fact size of atom increases down the group which leads to weaker interaction between atoms and its hydride leading to decrease in stability down the group. Atomic size increases, lattice energy decreases, hence stability decreases.
Does thermal stability decrease down the group?
Hence the bond dissociation energy decreases . iot becomes easy to break their bonds as going down the group. They become less stable and hence thermal stability decreases down the group.
Why carbonates of Group 1a elements are more thermally stable than those of group 2a?
Polarizing the carbonate ion The positive ion attracts the delocalized electrons in the carbonate ion towards itself. If the positive ion only has one positive charge, the polarizing effect is lessened. This is why the Group 1 compounds are more thermally stable than those in Group 2.
Why does the thermal stability of alkali metal carbonates increase down the group?
-As the size of alkaline earth metal ions increases across the group, the effect of ions on carbonate ions decreases. -On heating alkaline earth metal carbonates undergo thermal decomposition to form a metal oxide and carbon dioxide. -More heat supplied, carbonates become more thermally stable.
Why carbonates of group 1a elements are more thermally stable than those of group 2a?
That is why the Group 1 compounds are more thermally stable than those in Group 2. You have to heat the Group 1 compound more because the carbonate ions are less polarised by singly charged positive ions. In other words, as you go down the Group, the carbonates become more thermally stable.
Why does thermal stability decrease down Group 15?
The electron density on the central atom decreases with the increase in the size of the central atom. Hence its ability to donate a pair of electrons decreases thus reducing the basic character. So, as the size of the central atom increases, the stability decreases. Thus the thermal stability decreases down the group.
Why does thermal stability decrease down group 17?
Since H-X bond is more easily broken down the group, thermal stability of the halogen halide decreases.
Does stability increase down a group?
For carbonates and bicarbonates, I know that stability increases down the group, and for chlorides and fluorides, stability decreases down the group.