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Analysis of Tin Plating Bath Solution



An ongoing discussion from 2004 through 2015 . . .

(2004)

Q. Dear Sirs,

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


(2004)

A. Dear friend,

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


(2004)

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? I will try you method out.

Many thanks,

Ian Jones
- Wrexham


(2004)

Q. Dear friend

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 [returning]
- Tanagra, Viotia, Greace


(2004)

A. Dear Fotini

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 point of titration.

hadi khosravi
- tehran iran


(2004)

thumbsup2Dear 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 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Q. How to do analysis for tin plating solution to find out tin metal, tin sulphate, sulphuric acid?

Prajkta Tapare
student - Ahmednagar, India


April 14, 2015

Q. Dear sir,
What is meant by 10 Vat sample in the free alkali test you had mentioned. Please suggest; I am waiting for your response.

mahesh patil
- Thane, Maharashtra, Indian


April 2015

A. Hi Manesh. Hadi surely means a 10 ml sample from the tank of tin plating solution which you wish to analyze. Best of luck with it.

Regards,

pic of Ted Mooney Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey

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