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Bucurel11
a fost răspuns

3kg solutie 25% se amesteca cu 2kg solutie 5%. sa se afle concentratia procentuala

Răspuns :

C1=md1/ms1*100=>md1=C1*ms1/100=25*3/100=0.75kg

C2=md2/ms2*100=>md2=C2*ms2/100=5*2/100=0.1kg

C3=md3/ms3*100=0.85/5*100=17%

md3=md1+md2=0.85kg

ms3=ms1+ms2=3+2=5kg

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