Question

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

Answer 1

a.

1.calcular   Mm NaCl

Na: 1 x 23 = 23 g/mol
Cl: 1 x 35.45 = 35.45 g/mol
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             Mm = 58.45 g/mol

2. calcular % de cada elemento

Na (sodio)

58.45 g ----- 100 %
     23 g -----    x

x = 39.35 % Na

Cl (cloro)

58.45 g ---- 100 %
35.45 g ----    x

x = 60.65 % Cl

b.

1.calcular   Mm MgCl2

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

2. calcular % de cada elemento

Mg Magnesio

94.9 g ----- 100 %
   24 g -----    x

x = 25.28 % Mg

Cl (cloro)

94.9 g ---- 100 %
70.9 g ----    x

x = 74.71 % Cl