Chemical Forums

Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: Nervozni postar on April 11, 2017, 05:35:10 AM

Title: Zn ion concetration
Post by: Nervozni postar on April 11, 2017, 05:35:10 AM
Hi.I have one problem.Calculate the concetration of Zn ion if you mixed 20 mL of EDTA concetration 0.001M and 25 mL of zinc chloride same concetration.Mixed solutione also have ammonia 0.1 M and pH is 9.From reaction I see that there is more Zn ion and i calculate conditional constant but me solution is inncorect.
Title: Re: Zn ion concetration
Post by: Borek on April 11, 2017, 06:35:42 AM
No way to help you without seeing what you did (and knowing why you think it is wrong).
Title: Re: Zn ion concetration
Post by: Nervozni postar on April 12, 2017, 04:36:07 AM
From reaction I see that not of all of  Zn ion react with EDTA but I think that Zn ion also rect with ammonia to form new complex .I calculate coefficents of reaction with ligand ammonia using formula for this and coeficent for Y4- also using formula