Question

Urgent stie cineva cum pot rezolva aceste probleme?

Answer 1

6.

-calculez moli Cl2 ,din ecuatia de stare a gazelor

pV= niuRT,       unde p= 800mm/760mm/atm=1,05 atm

1.05x9,4= niux0,082x(273+27)    niu.Cl2=0,4mol

-calculez moli NaI  si  I2 din ecuatia chimica

1mol.........2mol....................1mol

Cl2 + 2NaI----> 2NaCl  +  I2

0,4mol....x=0,8mol.............y= 0,4mol

-calculez masa solutiei

m,d=mNaCl= niuxM= 0,8X150g/mol=120g

c= mdx100/ms---> ms= 120x100/35=..............................calculeaza !!!!

-calculez masa de iod

niu,teoretic= 0,4

niu,practic=0,4x80/100= 0,32mol

m= niuxM= 0,32molX254g/mol=...........................calculeaza !!!!