Question

peste o solutie cu masa de 175 g de concentratie 25% se adauga 200g apa. care va fi concentratia finala a solutie obtinute ?

Answer 1

C%= (md/ms)*100
25%= (md/175)*100
md= (25*175)/100
md= 43,75 g

C2%= (md/ms2)*100
C2%= (43.75/375)*100
C2%= 4375/375= 11,66%