Question

Pt a obtine 500g solutie de concentratie 12% se folosesc solutii de C=4% si C=50% . Cate grame din fiecare sol. trebuie sa folosim ?​

Answer 1

c= mdx100/ms--- >md3= c3xms3/100= 12x500/100g= 60g

ms3=ms1+ms2=500g

md3=md1+md2= c1xms1/100+c2ms2/100= 0,04ms1+0,5ms2=60

ms1=500-ms2

60=0,04(500-ms2)+0,5ms2-------> ms1=413g

                                                         ms2=87g