Question

Calculeaza masa solutiei care poate fi prigatita din 500 g de substanta daca partea de masa a substantei dizolvate este egala cu;a)10%,b)5%,c)20%,d)0,5%.

Answer 1

a)md=500g
c=10%
c=md/ms*100
ms=md*100/c
ms=500/100/10
ms=5000g
b)md=500g
c=5%
ms=500*100/5
ms=10000g
c)md=500g
c=20%
ms=500*100/20
ms=2500g
d)md=500g
c=0,5%
ms=500*100/0,5
ms=100000g