Question

Avand la dispozitie acid sulfuric 80% (ρ=1,75 g/$cm^{3}$) si apa distilata, sa se prepare 175 ml solutie acid sulfuric 15%

Answer 1

ro=ms/V=>ms=ro*V=1,75*175=306,25g sol. H2SO4

C=md/ms*100 ==> md=C*ms/100=>md=245g H2SO4

ms=md+mH2O=>mH2O=61,25g

ro=ms/V=>ms=306,25g sol.H2SO4

C=md/ms*100 => md=C*ms/100=15*306,25/100=45,9375g H2SO4

ms=md+mH2O=>mH2O=260,3125g

Pentru a prepara 175mL sol H2SO4 de C=15% se cantaresc 45,9375g H2SO4 si se adauga 260,3125 mL H2O distilata..

Este doar o parere..