Solubilities of S-Block compounds - HELP!!

Please explain me about the solubilities of hydroxides,fluorides,sulphates,carbonates,chlorides,oxides of Group 1 and 2 metals
Is there some logic to remember them.
Help!!

8 Answers

1
Shubh ·

In INORGANIC there is very less of tricks most are facts tht cant b changed!
U can refr PL SONI or NCERT!
Hydroxides r gr8ly soluble
Carbonates of 1A r highly soluble except Li2CO3 Bicarbonates are very less soluble whn compared to carbonates
All Halides are soluble in waer except LiF due to high lattice energy resulting in small size of both ions

11
Khyati ·

Yeah there is only one trick to remember them, keep on revising them as much as possible.[1]

11
Khyati ·

Some useful links

http://www.bbc.co.uk/dna/h2g2/A1002934

http://www.scribd.com/doc/8303239/70-Trends-in-PTable2-Chem-Revised

Yeh wali link bahut useful hai, tumhare sare doubts clear kar degi aur dusro ke bhi, so book this link in you computer

And please other people too[1]

11
Khyati ·

Halides of alkaline earth metals

(1) All beryllium halides are essentially covalent and are soluble in organic solvents. They are hydroscopic and fume in air due to hydrolysis. On hydrolysis, they produce acidic solution.

BeCI2 + 2H2O —→ Be (OH)2 + 2HCI

(2) The halides of all other alkaline earth metals are ionic. Their ionic character, however increases as the size of the metal ion increase.

(3) Except BeCl2 all other chlorides of group 2 form hydrates but their tendency to form hydrates decreases for eg – MgCl2.6H2O, CaCl2.6H2O.

(4) The hydrated chloride, bromides and iodides of Ca, Sr and Ba can be dehydrated on heating but those of Be and Mg undergo hydrolysis.

(5) BeF2 is very soluble in water due to the high hydration energy of the small Be+2 ion. The other fluorides (MgF2, CaF2, SrF2 and BaF2) are almost insoluble in water. Since on descending the group lattice energy decreases more rapidly than the hydration energy. Therefore whatever little solubility these fluorides have that increase down the group.

The chlorides, bromides and iodides of all other elements i.e. Mg, Ca, Sr, Ba are ionic have much lower melting points than the fluorides and are readily soluble in water. The solubility decreases some what with increasing atomic number.

(6) Except of BeCl2 and MgCl2, the other chlorides of alkaline earth metals impart characteristics colour to flame.

CaCl2 = Brick red colour
SrCl2 = Crimson colour

BaCl2 = Grassy green colour

11
Khyati ·

Oye talwal Machhli (Swordfish)

You din mentioned about the solvent, I mean whether the compounds ka solubility you ask in water or in some organic solvent.[3][1]

1
swordfish ·

Thanks Khyati. I request the TIIT admin to mark her post 'pink'
Actually, I was testing whether any fool will be there to answer this question without asking about the solvent, and I already got 1 lol ;)

11
Khyati ·

@ Talwar Machhli

[3][3]

1
Shubh ·

@sword fish i gave solublitis in water! @khyati tere paas itna tym hao to type all this or ctrlC and ctrlV??? :P

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