[flacon]

Hi, please can somebody help me? I can not solve this example:
What will be the molar concentration of ions Ni²⁺ in solution, which was prepared by mixing 100 ml 0,1 M Ni²⁺ and 150 ml 0,2 M EDTA? log β (NiY)=18,6, consider, α(Y^4-) (H)=1

The redult is 1,26*10^-19 M

Thank you for your help

[Borek]

Can you write reaction equation?

Can you write equation for stability constant?

Where does equilibrium lie? Far to the right? Far to the left? Somewhere in the middle?

Does this information help in finding - or at least approximating - concentrations?

[flacon]

so I try to write reacton equation, but I'm not sure of it: EDTA= H₄Y   H₄Y + Ni²⁺ = NiH₂Y + 2H⁺

β= [NiH₂Y]*[H⁺]²/[H₄Y]*[Ni²⁺]

but now I do not know what I can do next, please I need more help

[Borek]

My understanding is that you should ignore H⁺ and H₄Y dissociation.

Instead of stating for the third time that you don't know, try to answer my questions.

[flacon]

I really do not know how to solve it  , please could you reveal me the solution and explain this examlpe to me, please

[flacon]

good I try answer your questions

The reaction equation is H₄Y + Ni²⁺ = NiH₂Y + 2H⁺  EDTA= H₄Y

The equation for stability constant is β= [NiH₂Y]*[H⁺]²/[H₄Y]*[Ni²⁺]

The equilibrium is in the middle, because this is a equilibrium reaction

but it does not help me to solve this example , please help me, I am desperate,  c´mon Borek please