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Author Question: The following tetracylic structure is common to steroids, an importnat class of biomolecules that ... (Read 21 times)

itsmyluck

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on: Aug 23, 2018

The following tetracylic structure is common to steroids, an importnat class of biomolecules that have a number of sterocenters. Modify the structure on the right by placing the hydrogen atoms and methyl groups to accurately depict the structure on the left (including steeochemistry).
 
   



Question 2

Explain the formation of soap scum, formed in areas which have hard water. What chemical reaction takes place, and what physical process results?


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flexer1n1

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Reply #1 on: Aug 23, 2018
Answer to Question 1



Answer to Question 2

The sodium ion of a water-soluble (micelle-forming) sodium soap is exchanged for a calcium ion. The calcium salt is not soluble in water and precipitates.


itsmyluck

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Reply 2 on: Aug 23, 2018
YES! Correct, THANKS for helping me on my review

cpetit11

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Reply 3 on: Yesterday
Gracias!

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