Why does thermal stability of Group 2 increase 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.

What happens to the thermal stability of sulphates down the group?

Sulphate decompose on heating to give the corresponding oxide. The stability increases as the electropositive character of the metal or basic nature of the metal increases down the group (↓). This is clear form the increasing decomposition temperature down the group.

Which sulphate is more stable towards heat?

Sulphates of both group 1 and group 2 metals are stable towards heat. Sulphates of alkali metals are soluble in water.

Why do Group 2 sulfates decrease in solubility?

Since the hydration enthalpy decreases faster than the lattice enthalpy in the case of Group 2 sulphates, the solubility of Group 2 sulphates decreases while progressing down the group.

Why does solubility of Group 2 sulphates decrease?

What is the trend of thermal stability in periodic table?

Thermal stability increases with increasing cationic size, so increases as you go down a group in the Periodic Table, but decreases as you mojmve from ledmft to right across a period.

Why does thermal stability of carbonates increase down the group?

As the positive ions get larger down the group, they affect on the carbonate ions near them less. More heat must be supplied for the carbon dioxide to leave the metal oxide. In other words, the carbonates become more thermally stable down the group.

Why solubility of sulphates and carbonates decreases 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 do Group 2 sulphates decrease in solubility?

What is the thermal stability of sulphate?

Thermal stability is the decomposition of compounds on heating. More the strong bonding more thermal stability. As we move down the group 2 the size of cations increases and sulphate is a big ion group according to its size. and big group of compounds are stable with big ionic group.

What is the trend in thermal stability of Group 2 carbonates?

What is the trend in thermal stability of Group 2 carbonates? Both carbonates and nitrates of Group 2 elements become more thermally stable down the group. The larger compounds further down require more heat than the lighter compounds in order to decompose.

What are the solubility and thermal stability of alkali metals?

Compare the solubility and thermal stability of the following compounds of the alkali metals with those of the alkaline earth metals. (a) Nitrates, (b) Carbonates, (c) Sulphates. Nitrates, carbonates and sulphates of alkali metals are water soluble. On moving down the group, the solubility increases.

Why does thermal decomposition decrease down Group 2?

Also, why does thermal decomposition decrease down Group 2? All the carbonates in this Group undergo thermal decomposition to give the metal oxide and carbon dioxide gas. As you go down the Group, the carbonates have to be heated more strongly before they will decompose. The carbonates become more stable to heat as you go down the Group.

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