Question

Vreau rezolvarea corectă, va rog!!!

Answer 1

Răspuns:

c=mdx100/ms        unde  ms=md+m,apa    

md= 80gNaOH  

v,apa= 120ml

m,apa= 120mlx1 g/ml= 120g

ms= md+m,apa= 80+120=>200g

c= 80X100/200=>40%

c,m= niu/Vs

Vs= m,s/ro=200g/1,4726g/ml=135,8 ml=0,1358 l

niu=m/M=80g /40g/mol=2 mol

c,m= 2/0,1358 mol/l=14,7 mol/l

Explicație: