Can u pls explain the solubilities order ?

sir can u pls explain this exception

simun lithium hydrogen carbonate doesnt exist in solid state

Due to the small size of lithium, it will polarize the large anion oxygen, the C−O bond will weaken and Li−O bond will strengthen, they will split, and they will not be in the solid state.

And from sodium hydrogen carbonate to caesium hydrogen carbonate...solubility increases

I can't understand sir

bicarbonates solubility of alkali metal na??

yes sir

Down the group the electropositive character of the alkali metal increases due to increases in the size of the metal. The increase in electropositive character of the alkali metals tends to lower ionisation enthalpy i.e energy required to break Metal carbonate or metal bicarbonate . Thus, the cleavage of Metal carbonate or metal bicarbonate bond occurs more easily as we move down the group. This make the carbonate and  bicarbonate of metal to show increase in solubility  in water down the group.

and simun one thing is that inorganic chemistry is full of exceptions...and reason is given accordingly...so you have to learn exceptions..

sidha kuch nhi chalta inorganic me....

Now got simun.?

simun...make notes on general concept at one place and make exceptions at one place....and make your own concise notes from material or from video on YouTube....This strategy for periodic properties...main group elements

and ques mainly asked from exceptions part

tqq sirr

welcome simun😊

simun please mark the answer🙏

sir I m asking about the solubility order concepts it not based on question

ok sir

this is sir

when size increases hydration energy increases or decreased

sir what is the relation between hydration energy and solubility

more hydration energy more solubility

but sir in some where given that down the group hydration energy decreases

size of ion increase hydration energy decrease

but sir u told that size increases then hydration energy decreased

sry increases

sir here their is what happened

https://youtu.be/3KdmmTQ5-Vs

https://youtu.be/4as_pmMFG2g

tq sir