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CosminCrazy
a fost răspuns

Calulati concentratia finala obtinuta prin adaugarea a 5g sare la 75g solutie sare de concentratie 2%

Răspuns :

KostelMD

Se da:

msub02=5g

msol1=75g

ω1=2%

_________

ω2-?

ω1=msub1/msol1

msub1=ω1*msol1/100%=2%*75/100%=1,5g

msol2=msol1+msub02=75+5=80g

msub2=msub1+msub02=5+1,5=6,5g

ω2=msub2*100%/msol2=6,5*100%/80=8,125%


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