Zinc Chloride Solution Preparation
- Add about 13.63 gm of granulated zinc (previously washed with 0.1M HCl and then water) and dissolve in a minimum amount of 2 M HCl.
- Add more about 700 ml of purified water, mix and allow to cool to room temperature.
- Make up the volume 1000 ml with purified water. Mix solution thoroughly.
- Keep the solution for at least an hour and then carry out the standardization.
Zinc Chloride Solution Standardization
Method I
- Take 25 ml of 0.1 M Zinc chloride solutions into a clean & dried conical flask.
- Add about 4 gm ammonium acetate.
- Add 25 ml distilled water and add about 50 mg xylenol orange mixture. shake well.
- Add sufficient hexamine.
- Titrate the above solution with standardized 0.1 M Disodium Edetate with constant stirring and until the solution gives a yellow color.
- Note down the burette reading.
Molarity of 0.1 M Zinc chloride = -----------------------------------------------------
25
Method II
- To 25.0 ml of the solution add 4 g of ammonium acetate and 25 ml of water.
- Add 50 mg of xylenol orange mixture and sufficient hexamine, and titrate with 0.1 M disodium edentate until the colour changes to yellow.
- 1 ml of 0.1 M disodium edetate is equivalent to 0.013630 g of ZnCl2.
how to test zinc chloride purity test
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