Question

Masa de acid palmitic care reactioneaza stoechiometric cu 200cm cubi sol KOH de concentratie 0,2M este?

Answer 1

acidul palmitic: CH₃-(CH₂)₁₄-COOH
Cm=n KOH/Vs => n KOH=Cm*Vs=0,2*0,2=0,04moli
MC₁₆H₃₂O₂=16*12+32+16*2=192+32+32=192+64=256g/mol
256g                        1mol
CH₃-(CH₂)₁₄-COOH + KOH -> CH₃-(CH₂)₁₄-COO⁻K⁺ + H₂O
x=?                          0,04moli
x=0,04*256=10,24g acid palmitic