Analysis of Tin Plating Bath Solution
I am trying to find methods of analysis of a Tin Plating bath solution which consists of: Na2Sno3 3H2O =70 gr/l, NaOH= 11 gr/l,and lCH3COONa=22 gr/l. I have to determine the concentration of Tin Stannate (Na2SnO3 3H2O) (gr/l) and Free Sodium Hydroxide(NaOH)(gr/l)in the above solution. Please, suggest to me methods.
Thanking in advance,Fotini Kiriakou
Chemical Lab - Tanagra, Viotia, Greece
You have to take 5 ml of bath solution add to it 5 ml conc. HCl and 5 ml starch indicator and titrate it against 0.1 N Iodine solution. Multiply B.R. by 1.187 you will get the GPL of Stannous.Onkar Kulkarni
- Pune, Maharashtra, India
I would like to thank you for your response to the first part of my question, determination of Sodium Stannate. I would really appreciate if you or anybody else could give me a method for the second part of my question that is the determination of Free Sodium Hydroxide in the Tin Plating Solution Bath.
Thank you again,Fotini Kiriakou
- Tanagra, Viotia, Greace
mix 10 ml of vat sample with 50 ml Cl2Ba (10%) and few drops of thymolphtalein indicator. titrate with N hydrochloric acid to blue end point.
Titre x 4.00 =g/l free NaOH
PS:due to absorption of the indicator by precipitate,add few extra spot of indicator in half way of titration.hadi khosravi
- tehran iran
First of two simultaneous responses -- ++++
Dear Onkar Kulkarni,
I use the method you suggest for the tin stannic salts but add a nickel catalyst to the tin and HCl and boil to a receiving vessel for 40 mins and titrate as your method. This is time consuming but does work is your method comparable with mine? as I will try you method out
Many thanks,Ian Jones
Second of two simultaneous responses -- ++++
Dear Hadi, thanks a lot for your response to my question. It will help me very much.
Have a good day.Fotini Kiriakou
- Tanagra, Greece
November 5, 2012
Q. How to do analysis for tin plating solution to find out tin metal, tin sulphate, sulphuric acid?Prajkta Tapare
student - Ahmednagar, India