Extraction of caffeine from Tea

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 Requirements:- 

Tea bags, dichloromethane, separatory funnel, anhydrous sodium sulphate. 

Theory:-

Caffeine is a naturally occurring alkaloids found in tea and coffee. 
Caffeine is soluble in hot water but more soluble in organic solvent like dichloromethane. Water is Immisible with dichloromethane so caffeine come in organic solvent and from this we can easily extract from it. 

Procedure:-

1.Tea bags was put in a beaker containing distilled water and heat it for 10 minutes. 
2.After 10 minutes remove the tea bags from boiling water and again add these tea bags in another beaker containing hot water to remove leftover caffeine. 
3.Then cool down this solution and take it in separatory funnel and add dichloromethane in it. And shake  it properly so that two layer can form. 
4.Then after some time two layer separate out, then take lower layer as methylene dichloride is denser than water. 
5.Then add sodium sulphate in the lower layer so that it can hydrated with water. 
6.Then filter the solution and remove dichloromethane with simple distillation
7.Now after distillation, put the content on steam bath to remove leftover methylene chloride. 
8.Crude caffeine separate out and note down melting point. 

Result 

Melting point found is 230°C
Yield of caffeine=x g

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