Question

Ms1=100g
C1=30%
C2=8%
Mapa=?

Answer 1

ms1=100g

c1=30%

c2=8%

mapa=?

Afla md din primele 2 relatii:

c1=$\frac{md1}{ms1}$ *100=> md1=$\frac{ms1*c1}{100}$ = $\frac{100*30}{100}$=30 g

md1=30g

md1=m2 (diluare)

ms2=ms1+apa

c2=$\frac{md2}{ms2}$*100=>ms2=$\frac{md2*100}{c2}$=$\frac{30*100}{8}$=375g (aproximativ)

ms1+mapa=375g

100g+mapa=375g

mapa=375g-100g

mapa=275g