DATOS:
m=? n=0.5mol NaCL kg disolvente = 0.2kg H2O
SOLUCION:
M= n = 0.5mol NACL = mol NACL = 2.5m
Kg disolvente 0.2kg H2O kg H2O
2.-Calcula la molalidad de una disolución que contiene 12 kg de Mg (OH)2 en 500ml de H2O
DATOS:
m=?
n=( 12g Mg (OH)2) 1mol Mg(OH)2 = 0.2 mol Mg (OH)2
58 g MG (OH)2
Kg disolvente=(500ml) =500=0.5kg H2O
1 ml
SOLUCION:
m= n = 0.2 mol Mg (OH)2 = 0.4mol Mg (OH2) =0.4m
kg disolvente 0.5 kg H2O kg disolvente
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