Question

190,90 grame de fier cu 12% impuritati se ard in clor.
a) Calculeaza masa de sare formata
b) Calculeaza numarul de moli de clor folosit in reactie

Answer 1

Răspuns:

Explicație:

-se afla  masa pura de fier

p=88% [ 100-12=88 ]

mp=p.mi :100

mp=88 . 190,90 : 100=167, 992 g Fe pur

167,992 g    yg             xg

2  Fe    +    3Cl2   =2 FeCl 3

2.56g          3.71g      2.162,5g

x=167,992. 2 . 162,52: 112=487,47 gFeCl3

y=167,992 . 213 : 112=319,48 g clor

n=319,48 g: 71g/moli=4,49 moli Cl2

MFeCl3=56 + 3.35,5=162,5--->162,5g/moli

Verifica calculele !!!!!