activity on the topic chemistry in everyday life with aim, materials required, procedure, observation and result.
Answers
Chemistry in everyday life
hemicals of Food in Everyday Life
In food materials following chemicals are widely used,
Colouring agents
Artificial preservatives
Flow stabilizers
Binding substance
Artificial sweetness
Antioxidants
Minerals
Vitamins
Except vitamins remaining substances do not have nutritional value.
Artificial Preservatives: These prevent spoilage of food by stopping the growth of microorganism. For example, Sodium benzoate, sodium meta bisulphate.
Artificial Sweetness: These do not impart any calories to the body. Since these substances are excreted through urine.
Chemistry of Cleansing Agents in Everyday Life
What are Soaps and Detergents?
Soaps are sodium or potassium salt of higher carboxylic acid such as stearic acid, Palmitic acid and oleic acid whereas detergents contain a long chain of alkyl groups. Detergents in comparison to soaps can also function in hard water.
Saponification: Alkaline hydrolysis of triesters of glycerol to form soap is known as saponification. Soaps do not function in hard water since they precipitate in it.
Emulsifier: These increase the stability of the emulsion. For example, Potassium cetyl sulfate.
Preservatives: These are added to cosmetics to increase their shelf life. For example, benzyl alcohol, salicylic acid.
Thickeners: These given an appealing consistency. For example, Cetyl alcohol, Stearic acid.
Emollient: These soften the skin by preventing water loss. For example, Glycerine, zinc oxide.
Glimmer and Shiners: For example, mica, bismuth oxychloride.
Chemistry is important because everything you do is chemistry. Even our body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals.
- Medicine You need to understand basic chemistry so you can understand how vitamins, supplements, and drugs can help or harm you. Part of the importance of chemistry lies in developing and testing new medical treatments and medicines.