Sage-Tips

How does the thermal stability of Group 1 nitrates and carbonates compare to Group 2?

This is why the Group 1 compounds are more thermally stable than those in Group 2. The Group 1 compound must be heated more because the carbonate ion is less polarized by a singly-charged positive ion. The smaller the positive ion, the higher the charge density, and the greater the effect on the carbonate ion.

What is the order of thermal stability of carbonates?

The thermal stability of alkaline earth metal carbonates-MgCO3,CaCO3,SrCO3 and BaCO3 follows the order: (A) BaCO3>SrCO3>CaCO3>MgCO3. (B) CaCO3>SrCO3>MgCO3>BaCO3.

Why does thermal stability of Group 2 carbonates 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.

Does thermal stability increase down Group 1?

The thermal stability of most compounds of Group 1 elememts (hydroxides, carbonates, nitrates) increases down the group due to decrement in charge density of the cation.

Why does thermal stability increase down Group 2?

Which is correct order of thermal stability?

As oxidation state of centrel atom increases, bond strength increases.

What is stability of carbonate?

The stability of the metal carbonates can be measured by heating the carbonate and bubbling the carbon dioxide given off through limewater. The quicker the limewater becomes milky, the greater the rate of decomposition of the carbonate (meaning the carbonate is less stable).

Which is the most stable metal carbonate in Group 2?

As the electropositive character of the metal increases or the basicity of their hydroxides increases down the group, their thermal stability increases. Thus, BaCO3 is the most stable and hence option (d) is correct.

Which is more stable mgco3 or caco3?

caco3 is more stable than mgco3 beacuse thermal stability of carbonates of group 2 will increase down the group with the increase in the size of cation .

Are carbonates thermally stable down the Group 2?

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. All the carbonates in this group undergo thermal decomposition to the metal oxide and carbon dioxide gas. Full answer is here.

What is the effect of heat on Group 2 nitrates?

The carbonates become more stable to heat as you go down the Group. The Effect of Heat on the Group 2 Nitrates All the nitrates in this Group undergo thermal decomposition to give the metal oxide, nitrogen dioxide and oxygen. The nitrates are white solids, and the oxides produced are also white solids.

What are Group 2 carbonates and nitrates?

Thermal Decomposition of the Group 2 Carbonates and Nitrates This page looks at the effect of heat on the carbonates and nitrates of the Group 2 elements – beryllium, magnesium, calcium, strontium and barium. It describes and explains how the thermal stability of the compounds changes as you go down the Group.

Why do carbonates become more stable to heat?

The carbonates become more stable to heat as you go down the Group. All the nitrates in this Group undergo thermal decomposition to give the metal oxide, nitrogen dioxide and oxygen. The nitrates are white solids, and the oxides produced are also white solids. Brown nitrogen dioxide gas is given off together with oxygen.