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Chandan Panigrahi posted an Question
October 22, 2020 • 04:00 am
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30 points
30 points
- IIT JAM
- Chemistry (CY)
Why licl is more soluble than cscl
3 Answer(s)
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Priyanshu kumar Best Answer
The lattice energy of LiF is very high due to small size of Li+ ions and F− ions. The hydration energy of LiF is lower than lattice energy. In case of LiCl, the hydration energy is higher than the lattice energy. Hence, LiCl is water soluble. Due to higher polarization, LiCl has some covalent character. Hence, it is soluble in non polar solvents such as acetone.
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please ask chandan if any doubt
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check this chandan
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sir than can we say that Lif is more soluble than Licl in polar solvent?
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Lif is insoluble in water...
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In Lithium fluoride the lattice enthalpy is very high due to small size of fluoride ions. In this case the hydration enthalpy is very less.
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Some exceptional case you have to keep in mind
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tqq sir😇
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sir than this order is wrong?
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yes
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now clear chandan
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Dinesh khalmaniya 1
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Solubility of chlorides of alkali metal decrease down the group.Stability of alkali metal chlorides decreases down the group. lattice enthalpy of ionic solid of cation of same valency having same anion decreases. It's due to down the group size of cation increases so attractive force between anion and cation decreases.
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sir than for florides your statement is not apllicable?
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actually solubility is experimental phenomenon so we conclude after experiment. fluoride is exceptional case
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Suman Kumar![best-answer]()
The solubility of the chlorides decreases as we go down the group as the hydration enthalpy of the ions decreases at a greater rate than the lattice enthalpy of these chlorides. This is because the Cl- ion is larger than a molecule of H20 meaning that the decrease in lattice enthalpy (due to the increase in atomic radius of the positive ion as you go down the group) is more significant than the decrease in hydration enthalpy of the cation (the hydration enthalpy of Cl- remains constant). For solubility hydration enthalpy should be more;Therefore, CsCl is the least soluble of these group 1 chlorides, and LiCl is most soluble.
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