Răspuns:
1.
a)
ms = 10 g
C% = 0,9%
md=?
md = ms×C/100
= 10x0,9/100= 0,09 g NaCl
b)
md = 22,5 g
C= 0,9%
ms=?
ms= md×100/C= 22,5x100/0,9 = 2500 g ser fiziologic
2.
a)
mapa=180g
ms=200g
C=?
md=200-180=20g sare
C=md×100/ms=20×100/200=10%
A=10%
b)
md2=20+10=30g
ms2=200+10=210g
C=md×100/ms=30×100/210=14,28%
B=14,28%
Explicație:
