Question

Masa de anhidrida acetica ce trebuie adaugata la 400g solutie de acid acetic 6% pt a obtine o solutie de 4 ori mai cincentratae egala cu..

Answer 1

c1=md1x100/ms1---> md1= 6x400/100g= 24g acid acetic

c2= 4c1= 24%

md2=24+ m,acid obtinut din anhidrida

ms2=400+m,acid obtinut din anhidrida

24= (24+m,acid)x100/(400+m,acid)-

2400+100m,acid= 9600+ 24m,acid

m,acid=94,7g

102g.......................................2x60g

C4H6O3 + H2O---> 2CH3COOH

x..................................................94,7g

x=m,anhidrida acetica =-80,5g