Question

Intr un vas se amesteca mase egale de saramura de concentratie 28% si saramura de concentratie 20%
Calculati concentratia procentuala

Answer 1

c= mdx100/ms---> md= c x100/ms
c3/100=(md1+md2)/(ms1+ms2)
          = (c1ms1+c2ms2)/(ms1+ms2)
ms1=ms2=ms
c3/100= ms(0,28+0,20)/ 2ms
           = 0,48/2

calculeaza !!!!!