👤
SvMarian21
a fost răspuns

Se amesteca 200 g solutie acid clorhidric 40% cu 100 g solutie acid clorhidric 10 % .Sa se afle concentratia finala a solutiei obtinute.

Răspuns :

Notez "*" inmultire si "/" împărțire
ms1=200g HCl
Cp1=40%
ms2=100g HCl
Cp2=10%
Cp1=md1/ms1*100 =>md1=Cp1*ms1/100=40*200/100=80g
Cp2=md2/ms2*100=> md2=Cp2*ms2/100=10*100/100=10g
mdf=md1+md2=80+10=90g
msf=ms1+ms2=200+100=300g
Cpf=mdf/msf*100=90/300*100=30%

Alte intrebari