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what is the order of solubility in alkali metals??
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what is the order of solubility in alkali metals??
In the case of S block element we will see the difference in sizeof cation and anion i.e. solubility is directly proportional to difference in size
As here,alkali metal fluoride so LiF,NaF,KF,RbF,CsF
So here F is fixed ( fluorine is so small so we have to choose larger cation for higher solubility) then we will see the size of cation ,on going down the group size of cation increases so difference also increases so solubility increases
Some exceptions are their
carbonate,oxide, bicarbonate from the alkali metal and {oxide,sulphide and halide of Be(berilium) here Be is common cation }from the alkaline earth metal.
These can solve by the concept of fajans rule and rule :-
smaller cation ,larger anion (other than common element ) increases the covalent character and decrease solubility so here carbonate anion is common and then we will see for cation smaller the cation less the solubility so solubility increases the group.
As here,alkali metal fluoride so LiF,NaF,KF,RbF,CsF
So here F is fixed ( fluorine is so small so we have to choose larger cation for higher solubility) then we will see the size of cation ,on going down the group size of cation increases so difference also increases so solubility increases
Some exceptions are their
carbonate,oxide, bicarbonate from the alkali metal and {oxide,sulphide and halide of Be(berilium) here Be is common cation }from the alkaline earth metal.
These can solve by the concept of fajans rule and rule :-
smaller cation ,larger anion (other than common element ) increases the covalent character and decrease solubility so here carbonate anion is common and then we will see for cation smaller the cation less the solubility so solubility increases the group.
Community Answer
what is the order of solubility in alkali metals??
Order of Solubility in Alkali Metals
The solubility of alkali metal compounds, particularly their salts, varies based on their ionic size and the nature of the anions involved. The general order of solubility for alkali metals in water is influenced by these factors.
1. General Solubility Trend
- Alkali metals are highly soluble in water.
- The trend of solubility generally increases down the group from lithium (Li) to cesium (Cs).
2. Factors Affecting Solubility
- Ionic Radius: As you move down the group, the ionic radius increases, which leads to a decrease in lattice energy and increased solubility.
- Hydration Energy: Smaller alkali metals like Li have high hydration energy, but this is outweighed by the lattice energy of their salts, making them less soluble compared to heavier alkali metals.
3. Specific Order of Solubility
- Cesium (Cs): Most soluble due to low lattice energy.
- Rubidium (Rb): High solubility, just below Cs.
- Potassium (K): Good solubility, but lower than Rb.
- Sodium (Na): Moderately soluble, with higher lattice energy impacting solubility.
- Lithium (Li): Least soluble among the alkali metals due to its high lattice energy relative to hydration energy.
4. Summary of Solubility Hierarchy
- Most soluble: Cs > Rb > K > Na > Li (Least soluble)
Understanding the solubility order of alkali metals is crucial for applications in chemistry, biological systems, and various industrial processes.
The solubility of alkali metal compounds, particularly their salts, varies based on their ionic size and the nature of the anions involved. The general order of solubility for alkali metals in water is influenced by these factors.
1. General Solubility Trend
- Alkali metals are highly soluble in water.
- The trend of solubility generally increases down the group from lithium (Li) to cesium (Cs).
2. Factors Affecting Solubility
- Ionic Radius: As you move down the group, the ionic radius increases, which leads to a decrease in lattice energy and increased solubility.
- Hydration Energy: Smaller alkali metals like Li have high hydration energy, but this is outweighed by the lattice energy of their salts, making them less soluble compared to heavier alkali metals.
3. Specific Order of Solubility
- Cesium (Cs): Most soluble due to low lattice energy.
- Rubidium (Rb): High solubility, just below Cs.
- Potassium (K): Good solubility, but lower than Rb.
- Sodium (Na): Moderately soluble, with higher lattice energy impacting solubility.
- Lithium (Li): Least soluble among the alkali metals due to its high lattice energy relative to hydration energy.
4. Summary of Solubility Hierarchy
- Most soluble: Cs > Rb > K > Na > Li (Least soluble)
Understanding the solubility order of alkali metals is crucial for applications in chemistry, biological systems, and various industrial processes.
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what is the order of solubility in alkali metals??
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what is the order of solubility in alkali metals?? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about what is the order of solubility in alkali metals?? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for what is the order of solubility in alkali metals??.
what is the order of solubility in alkali metals?? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about what is the order of solubility in alkali metals?? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for what is the order of solubility in alkali metals??.
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