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This document describes a chemistry experiment on dyeing woolen cloth using the dye alizarin with different metal salt solutions as mordants. The experiment uses alizarin solution and three mordant solutions: potassium aluminum sulfate, ferric chloride, and barium chloride. By soaking woolen cloth in the dye solution after pre-treating with a mordant solution, different colors are produced - red with aluminum mordant, black-violet with iron mordant, and blue with barium mordant. The conclusion is that different mordants produce different colors when used with the same dye, and alizarin is an anthraquinone type dye.
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- 1. ON CHEMISTRY Prepared By: PRASHANT KUMAR Class: XI Roll : 70
- 2. CERTIFICATE This is certify that Rashmi Sharma, Roll No. _________ studying in standard XII of Lions Public School for the session 2010 – 2011 has worked on the project of chemistry and completed the same satisfactorily during the academic year. MR. SANJAY MISHRA Head of the Deptt. of Chemistry LIONS PUBLIC SCHOOL, SINDRI
- 3. ACKNOWLEDGMENT In this attempt of where and which of detailed and analytical of Chemistry investigatory Project work is based on effect of dyes has been performed. The investigator Project work is result of judicious mix of valuable teaching and experience of our great faculties. This attempt would have been adopted by him is a great task in completing this project work. And this attempt has been complied by the effort of Rashmi Sinha from Std. XII, Roll No. _______________ of science session of lions public school. Completed By : Guide By : Mr. Sanjay Mishra MR. SANJAY MISHRA Chemistry DEPARTMENT
- 4. APPARATUS Four 250 ml Beaker Glass Rod, or Wooden Stick Filter paper or old newspaper A piece of wooden cloth
- 5. CHEMICAL ALIZARIN SOLUTION 0.10 M Potassium Aluminum Sulphate solutions 010 M Barium Chloride Solution 0.10 M Ferric Chloride solution.
- 6. THEORY Alizarin has yellow colour. It is poor dye but dyes the cloth well when mordent with metal salt solution. This is because it forms a co-ordinate bond with the metal iron.
- 7. PROCEDURE Take four 250 ml. Beakers, number the beaker 1 to 4, put 0.1m barium chloride ion beaker No. 3 and Alizarin solution in beaker No. 4 and about 0.2g of NaCO3 in Alizarin solution. Heat the beaker No. 1,2 & 3 over a bath Immerse in each beaker one piece of woolen cloth. When fields soak enough solution, remove and rise thoroughly in worm water. Squeeze out excess of the water by pressing first against the side of beaker with wooden stick or rough filter paper. Now dip cloth pieces previous dipped into the alum solution in alizarin solution and squeeze out excess of the solution folds of old newspaper. Wash thoroughly with water and let in dry. Not in colours Repeat the process with cloth pieces previously dipped in ferric chloride solution. Note their colour drying.
- 8. OBSERVATION Nature of the Fabric Dyed = Woolen Cloth Dye use = Alizarin Mordant = Colour Produced Potash Alumn i.e. Aluminum Red Ferric Chloride i.e. Iron Black – Violet Barrium Chloride i.e. Barium Blue
- 9. CONCLUSION Different mordant produce different colour with the same dye. Alizarin give red colour with aluminum. Black –violet with Barium mordant. Alizarin is an Anthraquinone type dye.