whats the concept here?

for reversible reaction in aq soln
Zn2++X-→ZnX+,Keqis greatest when X is???
a)F-
b)NO3-
c)ClO4-
d)I-

21 Answers

1
skygirl ·

pata ni yaar kaise F- ans hai!

aur sochte hai ... sapne me [3]

1
skygirl ·

great :) ! tx priyam :)

33
Abhishek Priyam ·

H+ is also hard..

NH3 is hard base.
Acetate ion is hard base

and .... :P

33
Abhishek Priyam ·

Aur bhi hai hard acid aur bases..

Zn2+ is also hard..
u should haev heard ZnCl2 more than ZnI2

24
eureka123 ·

hard acids:
small atomic or ionic radii.. ek Li+ Na+ H+ Carbocations..

but how is then Zn2+ hard acid?????????

24
eureka123 ·

ok then.......it is a new concept for me.........[1][1]

33
Abhishek Priyam ·

Hard acid form more stable compounds with hard bases.. and soft with soft..

hard acids:
small atomic or ionic radii.. ek Li+ Na+ H+ Carbocations..

hard bases: OH- OR- F- Cl- low polarisable.

Soft acids :
Silver platinum mercury

soft bases:
I- CO SCN-

24
eureka123 ·

I cant understand ......priyam.....

1
Aditya ·

great!

33
Abhishek Priyam ·

F-

because ZnF+ is most stable. as Zn+2 is hard acid and F- is hard base.. so hard hard combination.. so more stable product

24
eureka123 ·

pehli baar mera tukka theek thaa.....par pata nahin thaa itni musibat mein daal dega.....[3][3]

1
skygirl ·

isnt it I- ?

1
Aditya ·

@sky,
even i used the same concept, but for finding equivalent conductance which is greatest for ZnI. But as it is equilibrium const.,......sry!

1
skygirl ·

back bonding ?!

back bonding only occurs 'efficiently' for pÎ -pÎ bonds..

and in Zn2+, there is NO empty orbitals...

Zn = 3d10,4s2

Zn2+ = 3d10.

so no possibility of back-bonding.

1
°ღ•๓яυΠ·

yeh bhi hosakta hai ki Zn ke pass orbitals hai avcnt n F is quite ful of eltrons so ..........woh (back bondin type )

1
skygirl ·

the concept is: the more the tendency of X to get oxidised, the more the reaction tends towards right and hence more the Keq.

but then I- has the most tendency to lose e- .. !!

F- is unstable n wud want to get oxideisd.... but is it more than I- [12]

24
eureka123 ·

my tukka was a which was rite,,,,,,,,,,,,,but i still cant get teh concept..

24
eureka123 ·

i think it is eqiulibrium constant......

1
Aditya ·

haha....then it's D.

1
Aditya ·

By Keq, do u mean equivalent conductance??

1
°ღ•๓яυΠ·

intution
D

Your Answer

Close [X]