Question

200 ml solutie acid azotic 92% (densitate acid azotic =1,496g/mL) se amesteca cu 200 mL solutie acid sulfuric 98% (densitate acid sulfuric =1,841g/mL). Determina compozitia procentuala masica a amestecului rezultat.

Answer 1

ro = ms/V
ms1 = 200*1,496 = 299,2 g soluție HNO3
c = md*100/ms
md1 = 299,2*92/100 = 275,264 g HNO3
ms2 = 200*1,841 = 368,2 g H2SO4
md2 = 368,2*98/100 = 360,836 g H2SO4
md3 = md1+md2 = 275,264+360,836 = 634,1 g amestec
% HNO3 = 275,264*100/634,1 = 43,41%
% H2SO4 = 360,836/634,1 * 100 = 56,58%

Answer 2

solutia de HNO3 :    Vs1 = 200ml; q1 = 1,496 (ms1 = 299,2g ; md1 = 275,264g)
solutia de H2SO4 : Vs2 = 200ml; q2 = 1,841 (ms2 = 368,2g; md2 = 196g)
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solutia finala : ms = 667,4 g
cHNO3 = 275,264