Răspuns :
Cm = conc. molara = niu/Vs
Cm1 = c%xrox10/miu
= 63x1,53x10/98 = 9,84 mol/L
=> niu1 = Cm1 x Vs1 = 2x 9,84 = 19,68 moli H2SO4
niu2 = Cm2xVs2 = 2x3 = 6 moli
=> niu.tot = niu1+niu2 = 25,68 moli
=> Vs.tot = Vs1+Vs2 = 5 L
=> Cm.final = niu.tot/Vs.tot
= 25,68/5 = 5,136 mol/L
stim ca c% = mdx100/ms
ro = ms/Vs
=> ms1 = roxVs1 = 1,53x2000 = 3060 g sol H2SO4
=> md1 = ms1xc1%/100
= 3060x63/100 = 1927,8 g H2SO4
din Cm = roxc%x10/miu
=> c% = miuxCm/10xro
= 98x2/10x1,14 = 17,2%
ms2 = ro2xVs2
= 3000x1,14 = 3420 g sol. H2SO4
=> md2 = ms2xc2%/100
= 3420x17,2/100
= 588,24 g
=> md.tot = md1+md2 = 2516 g
=> ms.tot = ms1+ms2 = 6480 g
=> c%.final = md.totx100/ms.tot
= 2516x100/6480 = 38,83%