Răspuns:
Explicație:
500g NaCl
p= 80%
react. cu AgNO3
c= 25%
randament= 90%
- se afla masa pura de NaCl
mp= p . m i : 100
mp= 80 . 500 : 100= 400 g NaCl pura
-se afla masa de NaCl care va reactiona [randament= 90%]
m= 90.400 : 100= 360gNaCl
360 g xg
NaCl + Ag NO3= NaNO3 + AgCl
58,5g 170g
x= 360 . 170 : 58,5= 1046,15 g AgNO3
-se afla masa de solutie de AgNO3
ms= md.100 : c
ms= 1046,15 .100 : 25=4184,61 g sol AgNO3
M NaCl= 23 + 35,5= 58,5 -----> 58,5g/moli
MAgNO3= 108 + 14 + 3.16= 170------> 170g/moli