Am si eu nevoie de ajutor la un test la chimie





Răspunsuri la întrebare
poza 1 => a)
poza 2 => 1) clorura de actil + anhidrida acetica
2) a.
poza 3 => 1) acetat de etil
2) solubilitate in apa
3) alcool etilic --> acid acetic
poza 4 => 1)
Cm = 1 M , Vs = 50 mL = 0,05 L
Cm = n/Vs => n = CmxVs = 1x0,05 = 0,05 moli NaOH
5,1 g 0,05 moli
CnH2n+1COOH + NaOH --> CnH2n+1COONa + H2O
M 1
=> M = 5,1x1/0,05 = 102 g/mol
=> 14n+46 = 102 => n = 4 => acid pentanoic
CH3-CH2-CH2-CH2-COOH , acid n-pentanoic
CH3-CH-CH2-COOH , acid 3-metilbutanoic
-CH3
CH3-CH2-CH-COOH , acid 2-metilbutanoic
-CH3
-CH3
CH3-C-COOH , acid 2,2-dimetilpropanoic
-CH3
2) C5H10O2
poza 5 => 1) acid 3-metilbutanoic
2) CH3CH2COO⁻Na⁺
3) CH3COO⁻K⁺