[Szeck]

Hi everyone!
Sry for my bad chemical english,
but i have a problem here....

"A solution of 0,4M K2Cr2O7 is added to another solution 0,5M of FeSO4 (Volume = 0,05l (50ml))
Calculate the volume of K2Cr2O7."

I set the reaction like so:
K2Cr2O7 + FeSO4 -->  K2SO4 + FeCr2O7
The formula to find the volume is: V1*M1 = V2*M2
So, 0,4x=0,5*0,05
The result is 0,0625litres.

I don't know if the reaction is correct...

Thanks in advance for the help.

[Schrödinger]

If the solution is acidic, then I think you should think of oxidizing the Fe²⁺ to Fe³⁺. Try writing the equations for that. (ionic equations will do, i guess)

[Szeck]

Yes BUT,
my solution is not acidic, because the exercise doesn't say that there is an acid or a base.
So, I haven't set the reaction in the ionic form.

Do you think that the reaction is correct? I don't have any clear ambient...

[Schrödinger]

I don't know the exact reaction in a neutral medium, but something tells me that K₂Cr₂O₇ will oxidize the Fe²⁺ to Fe³⁺.