Chemistry Project 343u57

TO PREPARE PIGMENTS AND POSTER PAINTS. Made By: Sneha Navin Rochani Class: XII-D 1

Roll No. 15

CERTIFICATE This is to certify that Sneha Navin Rochani, Roll No. 15 of class XII-D has satisfactorily completed her chemistry project on topic : To prepare pigments and poster paints using various chemicals and reagents. in class 12th curriculum of all Senior School Certificate Examination of the CBSE. This project is in accordance with the guidelines issued by CBSE. Date: Internal Examiner

External Examiner

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School Seal

Principal's Signature

INDEX Sr. No. 1. 2. 3. 4. 5.

6. 7. 8. 9.

Contents Page No. Acknowledge ment Aim and Materials Theory Chrome Yellow Efficiency of Chrome Yellow Prussian Blue Efficiency of Prussian Blue Conclusion Bibliography

Signature

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ACKNOWLEDGEMENT It would be my utmost pleasure to express my sincere thanks to the principal of Delhi Public School, Nerul Mr.J.Mohanty and my chemistry teacher Mrs. Indu Narang in providing a helping hand in this project. This project wouldn't have been possible without chemistry lab assistant Mrs. Shashi Singh. Their valuable guidance, and supervision all through this project are responsible for attaining its present form. I would also like to thank my parents and my classmates as they encouraged me to put forward my project. 4

AIM AND MATERIALS Aim: To prepare pigments and poster paints using various chemicals and reagents. Materials Required: 1. Clear glue 2.Water 3.Potassium Chromate 4.Lead Nitrate 5.Beakers 5

6.Iron (III) Chloride 7.Potassium Ferrocyanide 8.Filter Paper

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THEORY 1.Pigments–A pigment is a finely divided material which contributes to optical and other properties of paints. Pigments may be classified according to their composition or source which they are obtained from. However the most common and useful classification is that color pigments can be made using simple chemical reactions and techniques. 2.Poster Paints- Grinding a pigment or a mixture to a very fine powdered and then suspending the powder in a very fine liquid makes poster paint so as to a uniform suspension. For making poster paints the pigents made by various chemical reactions are thoroughly mixed with the medium. Sometimes the paint hardens but the addition of lukewarm water to it can soften it. 7

3.Medium- Medium used for making paints is made by mixing 30ml of clear glue with 10ml of water and adding a drop of liquid detergent to it.

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CHROME YELLOW Chemically known as LEAD CHROMATE (PbCrO4) the yellow pigment is obtained as follows: Procedure1. Dissolve 7gm of Potassium Chromate in 50mL water and 10gm Lead Nitrate in 100mL water in two separate beakers. 2. Pour the Potassium Chromate solution in the Lead Nitrate and stir continuously. 3. Lead Chromate separates as precipitate and is the required pigment. 4. Filter the precipitate and dry the pigment. Reaction Involved :K2CrO4 + Pb(NO3)2

PbCrO4 + 2KNO3 9

EFFICIENCY OF CHROME YELLOW Total mass of reactants used = (Excluding the mass of water used for dilution) =

Mass Of Paint/Pigment Obtained =

Efficiency in formation of yellow colour =

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PRUSSIAN BLUE Chemically known as Complex Ferro Cyanide (Fe4[Fe(CN)6]3). Procedure: 1.Make A solution of 5gm of Hydrated Iron(III) Chloride in 50mL of water. 2. Make a solution of 10gm of Potassium Ferro Cyanide in 75mL of water. 3. Add Iron Chloride solution into Potassium Ferro Cyanide(K4[Fe(CN)6]) solution while stirring briskly. 4. A dark blue colour very fine powdered type substance precipitates. 5.Filter the precipitate and wash it with water. It takes a long time to filter this substance. Reaction involved : 3K4[Fe(CN)6] + 4FeCl3

Fe4[Fe(CN)6]3 11

EFFICIENCY OF PRUSSIAN BLUE Efficiency Total mass of reactants used = (excluding mass of water used for dilution) =

Mass of Paint/Pigment obtained =

Efficiency In Formation Of Blue Pigment Obtained is =

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CONCLUSION Fine poster paints were obtained using various chemicals and reactants.

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BIBLIOGRAPHY 1. http://projects.icbse.com 2. www.google.com

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