Question

amestecam 700g solutie de soda de rufe cu concentratia 30% cu 250g soda cu 800g solutie de soda de rufe cu concentratia 70% cu 300g soda si inca 1kg de solutie de soda cu concentratia 80% cu 750 g soda si 100 apa.Ce concentratie are solutia obtinuta?

Answer 1

C=md/ms*100 ;

md1=30*700/100=210g 

md2=250g

md3=70*800/100=560g

md4=300g

md5=80*1/100=800g

md6=750g

md final = md1+md2+....md6=2870g

ms final = ms1+ms2+.....mH2O = 3900g

C final = 2870/3900*100 = Calculeaza !!

Verifica rezultatele...