Question

37. Determinar el % en peso de Cloro (Cl) presente en los siguientes compuestos: a. Cloruro de Sodio (NaCl) b. Cloruro de Magnesio (MgCl2)

Answer 1

a)
calcular Mm NaCl
Na: 1 x 23 = 23 g/mol
Cl: 1 x 35.45 = 35.45 g/mol
```````````````````````````````````````
           Mm = 58.45 g/mol

2. calcula % de cloro

58.45 g --- 100 %
35.45 g ---     x

x = 60.65 % de Cl

b)
1. calcular Mm del MgCl2

Mg: 1 x  24 = 24 g/mol
 Cl:  2 x 35.45 = 70.9 g/mol
``````````````````````````````````````
          Mm = 94.9 g/mol

2. calcular % de cloro

94.9 g ---- 100 %
70.9 g ----      x
 
   x = 74.71 % de Cl