Question

Acizi grasi cu M=198 g/mol si NE=2 sunt in numar de....

Answer 1

Acizii au formula CaHbO2

NE=(2+2a-b)/2

=> 2+2a-b=4=> 2a-b=2 => b=2a-2

Formula devine: CaH2a-2O2

M=14a+30=198 => a=12

Compusul are formula moleculara C12H22O2, deci un acid gras nesaturat.

Acizii grasi au catena liniara.

CH2=CH-(CH2)9-COOH

CH3-CH=CH-(CH2)8-COOH

CH3-CH2-CH=CH-(CH2)7-COOH

CH3-(CH2)2-CH=CH-(CH2)6-COOH

CH3-(CH2)3-CH=CH-(CH2)5-COOH

CH3-(CH2)4-CH=CH-(CH2)4-COOH

CH3-(CH2)5-CH=CH-(CH2)3-COOH

CH3-(CH2)6-CH=CH-(CH2)2-COOH

CH3-(CH2)7-CH=CH-CH2-COOH

CH3-(CH2)8-CH=CH-COOH