Question

300g solutie reactioneaza HCL de concentretie 36,5% reactioneaza cu o solutie NaOH de concentretie 40%. a)cantitatile produsilor de reactie

Answer 1

1. Din Cp deduc md=Cp*ms/100=36.5*300/100=109.5g HCl
2. Merg pe reactie si aflu md:
36.5g....40g........58.5g
HCl + NaOH --> NaCl +
109.5g....x=120g....yg
18g
H2O
zg
y=58.5*(109.5+120)/76.5=5*229.5/76.5=15 g NaCl
z=18*229.5/76.5=54g H2O