Why does the thermal stability of Group 2 hydroxides increase down the group?
Why does the thermal stability of Group 2 hydroxides 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 is the thermal stability of group 2 elements?
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.
Which of the following hydroxide of alkali metal have highest thermal stability?
Thermal stability of alkali metal hydroxides increases in the order of LiOH < NaOH < KOH.
Which among the following hydroxide are stable to heat?
Solution : `Ba(OH)_(2)` is most themally stable because the thermal stability of group 2 hydroxides increases with increasing atomic number due to the increase of electropositive character.
How do you find the thermal stability order?
The correct order of thermal stability of alkali metal hydrides…
- A. CsH>RbH> KH >NaH>LiH.
- B. LiH>NaH> KH >RbH>CsH.
- C. CsH>NaH> KH >RbH>LiH.
- D. LiH> KH >NaH>RbH>CsH.
What does thermal stability depend on?
Thermal stability depends on the size of the atom and the bond strength. As the size of the atom decreases, the bond dissociation energy increases and hence, the thermal stability increases and vice-versa i.e. it is inversely proportional to the size of the atom.
What is the thermal stability order of sulphates of Group 2 elements in groups?
BeSO4,MgSO4,CaSO4,SrSO4.
Which of the following hydroxide is more stable?
The hydroxides of the alkali metals, lithium, sodium, potassium, rubidium, and cesium, are the strongest bases and the most stable and most soluble of the hydroxides. Sodium hydroxide, NaOH, also known as caustic soda or lye, is of great industrial importance.
Which is more stable LiOH or NaOH?
No, LiOH is a strong base, like the other alkali bases. It is a bit weaker than bases like NaOH though, because it’s enthalpy of formation is different.
Which is the correct order of thermal stability?
So, the correct order of increased thermal stability is: BeCO3.
Which of the following has lowest thermal stability?
Solution : Thermal stability of alkali metal oxy-acid salts increases with increasing metallic character so `Li_(2)CO_(3)` has lowest stability.
Which has highest thermal stability?
Hence, among the given alkali metal halides, NaCl is highest thermal stability.
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