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a fost răspuns

1. Calculeaza masa de sare care este dizolvata in 600g saramura (apa+sare) de concentratie 15%.
2. Ce concentratie procentuala are solutia obtinuta prin rezolvarea a 80g zahar in 240g apa?
DAU COROANA !

Răspuns :

Moni23
Md=?
Ms=600g
C=15%
C/100=md/ms
15/100=md/600g=>md=15x600/100=90g
Md=80g
Md'=240g
Ms=md+md'
Ms=80+240g=320
C/100=md/ms
C/100=80/320=>c=100x80/320=25%

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