Question

cual es la molaridad de una solución que contiene 16 gr de Ch3OH en 0.2 litros de solución

Answer 1

Respuesta:

M = 2.5 molar del CH3OH

Explicación:

cual es la molaridad de una solución que contiene 16 gr de CH3OH en 0.2 litros de solución.

Mm CH3OH (metanol) = 32 g/mol

1. calcular moles de soluto

n = masa/Mm

n = 16 g /  32 g/mol

n = 0.5 moles de soluto

2. calcular molaridad

M = n /V(L)

M = 0.5 mol /0.2 L

M = 2.5 molar

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M =  __ g___

       Mm x V(L)

M =  _____16 g____

       32 g/mol x 0.2 L

M = 2.5 molar