Răspuns :
Se dă Rezolvare
m(sol)= 360 g m(NaOH) = 20% · 360 g = 72 g
ω(subst)= 20% 100%
m(NaOH= ?
Raspuns m(NaOH) = 72g
m(sol)= 360 g m(NaOH) = 20% · 360 g = 72 g
ω(subst)= 20% 100%
m(NaOH= ?
Raspuns m(NaOH) = 72g
Se da:
ms=360 g
W=20 %
----------------------
m(NaOH)-?
Rezolvare:
W=md/ms *100%
md=W*ms /100% <=> 360g *20% / 100%=72g
Raspuns:m(NaOH)=72g
ms=360 g
W=20 %
----------------------
m(NaOH)-?
Rezolvare:
W=md/ms *100%
md=W*ms /100% <=> 360g *20% / 100%=72g
Raspuns:m(NaOH)=72g