Question

Se amesteca 80g sirop ( solutie apa + zahar ) decp=10% cu 200g solutie sirop de cp=30% si cu 50g apa , care este cp final ?

Va rog urgent !!! 

Answer 1

Hey!

ms1 = 80 g
c1 = 10%
ms2 = 200 g
c2 = 30%
mH2O = 50 g
cfinal = ? 

--------------------------
md1 = c1*ms1/100
md1 = 10 * 80/100  
md1 = 8 g
md2 = c2*ms2/100
md2 = 30*200/100
md2 = 60 g
mdfinal = md1+md2
mdfinal = 60 g+ 8g
mdfinal = 68 g
msfinal = ms1+ms2+mH2O
msfinal = 80g+ 200g+50g
msfinal = 330 g
cfinal = mdfinal*100/msfinal
cfinal = 68*100/330
cfinal = 20,6 %.