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Calculati solutiile formate din: 100gr apa si 36gr sare de bucatarie; 200grapa si 5gr NaCl; 50grapa si 2gr sulfat de potasiu; 500gr apa si 30gr zahar; 200gr apa si 80gr alcool etilic.

Răspuns :

ms=md+mH2O=36+100=136g sol NaCl

ms=md+mH2O=5+200=205g sol. NaCl

ms=md+mH2O=2+50 = 52g sol. K2SO4

ms=md+mH2O=30+500=530g sol. zahar

ms=md+mH2O=80+200=280g C2H5-OH