Răspuns :
a) C1=md*100/ms, md =c1*ms/*100 =10*200/100=20g HNO 3
b) ms =md *100/c=20*100/8=250 g, m apă =250-200=50g
ms=200g
c=10%
md=ms*c/100=200*10/100=20g HNO3
ms1=ms+mH2O=200+mH2O
md1=md=20 g
c1=8%
ms1=md1*100/8= 250 g
200g+mH2O=250 g ==>
mH2O=250g-200g=50g
c=10%
md=ms*c/100=200*10/100=20g HNO3
ms1=ms+mH2O=200+mH2O
md1=md=20 g
c1=8%
ms1=md1*100/8= 250 g
200g+mH2O=250 g ==>
mH2O=250g-200g=50g