Why the solubility of carbonates and bicarbonates of alkali metals increases down the group?

Solubility of carbonates and bicarbonates of alkali metal increases down the group for the alkali metal . Thus, the cleavage of Metal carbonate or metal bicarbonate bond occurs more easily as we move down the group. This make the carbonate and bicarbonate of metal to show increase in solubility in water down the group.

Why does the solubility of alkali earth metal carbonates and sulphates decrease down the group?

The size of anions being much larger compared to cations, the lattice enthalpy will remain almost constant within a particular group. Since the hydration enthalpies decrease down the group solubility will decrease as found for alkaline earth metal carbonates and sulphates.

Why does solubility of carbonates of Group 1 increases down the group?

Why does the solubility of alkaline earth metal carbonates and sulphates in water decrease doewn the group? Since lattice enthalpy decreases much more than the hydration enthalpy with increasing ionic size, the solubility increases down the group (↓).

What is the trend of solubility down the group?

On going down the group, the size of the cation increases and the salt becomes more ionic in nature. So, the solubility also increases down the group. Thus, the solubility of fluorides of alkali metals increases down the group.

What happens to solubility of carbonates down the group?

Solubility of the carbonates The carbonates become less soluble down the group. All the Group 2 carbonates are very sparingly soluble. Magnesium carbonate, for example, has a solubility of about 0.02 g per 100 g of water at room temperature.

Why does solubility of Group 2 carbonates decrease down the group?

The size of CO2-3 and SO-4 ions are much bigger than those of the cations . Since the hydration enthalpies decrease as the size of the cation increases down the group , the solubility of carbonates and sulphates of alkaline earth metals decreases down the group .

Why does the solubility of carbonates decrease down group 2?

The solubilities of carbonates decreases down the magnesium group due to a decrease in. Due to decrease in hydration energy of cation and lattice energy remains almost unchanged.

What is the solubility trend of alkaline earth metals?

Why Solubility of Alkaline Earth Metals decreases down the Group? Beryllium ion is the most soluble and the solubility decreases with increasing size so that Barium ion is the least water-soluble alkaline earth metal ion. Solubility in water is related to the ionic nature and size.

Are bicarbonates more soluble than carbonates?

3 Answers. Sodium carbonate is way more soluble than sodium bicarbonate at all temperatures above about freezing. Na2CO3 has several crystalline hydrates that are temperature sensitive and make the curve less smooth than most other salts.

What is the trend of solubility of carbonates of alkaline earth metal?

“Solubility of sulphates and carbonates of alkaline earth metals decreases as the atomic number of the metal increases down the group.”

What is the solubility of carbonates of the alkaline earth metals?

Hence, the solubilities of carbonates of the alkaline earth metals decrease down the group mainly due to decreasing hydration enthalpies of the cations from Be2+ to Ba2+. The carbonates of magnesium and other alkaline earth metals are sparingly soluble in water and their solubility decreases down the group from beryllium to barium.

Why does the solubility of carbonate decrease down the group?

The reason being that the carbonate ion is so large that relatively small changes in the sizes of the cations from Be2+ to Ba2+. Hence, the solubilities of carbonates of the alkaline earth metals decrease down the group mainly due to decreasing hydration enthalpies of the cations from Be2+ to Ba2+.

Are bicarbonates soluble in alkali metals?

Solubility of bicarbonates: bicarbonates of alkali metals are less soluble than their corresponding carbonates. But, the bicarbonates of alkaline earth metals are more soluble than their corresponding carbonates.

What is the solubility of sulphates and bicarbonates?

Sulphates of alkaline earth metals are sparingly soluble and do not form alums. Solubility of bicarbonates: bicarbonates of alkali metals are less soluble than their corresponding carbonates. But, the bicarbonates of alkaline earth metals are more soluble than their corresponding carbonates.