Question

Do 40g 20% roztworu dodano 100g 10% .oblicz stezenie po zmieszaniu

Answer 1

ms= 40g

cp= 100g

20% z 40g = 8g

ms = 48

ms + cp =???

 

cp = 10% * 100g = 10g

ms + cp =  158g

 

mysle że oto Ci chodzilo nie?

 

 

Answer 2

ms1=20%*40g:100%

ms1=8g

ms2=10%*100g:100%

ms2=10g

 

Cp=(ms1+ms2):(mr1+mr)*100%

Cp=(8g+10g):(40g+100g)*100%

Cp=18g:140g*100

Cp=12.85%