Cira Ioana asked 8 years ago
Care este formula molec a unui ester rezultat prin rc unui alc mono sat cu un acid carbox mono sat stiind ca procentul de masa a hidrogenului din ester este 10,35 si ca nr de at de H din acid este mai mic cu 2 decat cel din alc?
1 Answers
Tudor admin Staff answered 8 years ago
Fie n numarul de atomi de carbon din ester.Cum esterul provine dintr-un alcool monohidroxilic saturat si un acid monocarboxilic va avea formula moleculara CnH2nO2
10,35=(2n/(14n+32))*100 =>200n=10,35*(14n+32) ….Efectuezi calculele si =>n=6=>Formula esterului este C6H12O2.
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