1. What conclusion we can reach based on phenolphthalein test on saponification.
ID: 799643 • Letter: 1
Question
1. What conclusion we can reach based on phenolphthalein test on saponification.?
2. After adding the CaCl2 the solution turned the water " hard". What effect did this have on the lathering ability od the soap? On the lathering abilitiy of detergent?
3. What do the letters mean in " EDTA"? how do water softeners work?
4 . Both soaps and detergent lower the surface tension of water. How does this help in cleaning?
What conclusion we can reach based on phenolphthalein test on saponification.? After adding the CaCl2 the solution turned the water " hard". What effect did this have on the lathering ability od the soap? On the lathering abilitiy of detergent? What do the letters mean in " EDTA"? how do water softeners work? Both soaps and detergent lower the surface tension of water. How does this help in cleaning?Explanation / Answer
1.phenolphthalein test indicates whether the solution is acidic or basic. or neutral. hard water contains bases of calcium and florate. so throught that test we can identify if it is permanent hardness or temporary hardness. it is used to find this conclusion.
2. hard water doesnot give lather when treated with soap. only soft water gives lather. it is one of the tests to identify hard water. so when cacl2 is added lathering ability is reduced. i.e soap or detergent fails to give lather when treated with water.
3.Ethylenediaminetetraacetic acid is full form of EDTA.
After being bound by EDTA, metal ions remain in solution but exhibit diminished reactivity. EDTA is produced as several salts, notably disodium EDTA and calcium disodium EDTA.
4.
Water molecules at the surface are surrounded by air on one side, and by water on the other. The molecules will be more strongly attracted to one-another, rather than the air, so the surface molecules are bound together more tightly than molecules within the liquid.
The soap molecules have a "hydrophilic" end, which is attracted to water, and a "hydrophobic" end, which repels water. So, you end up with a layer of soap floating on the surface of the water, which has a lower surface tension.
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