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TEMA 10-Disoluciones

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2.- FORMAS DE EXPRESAR LA CONCENTRACIÓN.<br />

• Fracción molar (x)<br />

• Molalidad (m)<br />

m<br />

i =<br />

• Molaridad (M)<br />

M<br />

x =<br />

i<br />

n<br />

n<br />

Tot<br />

ni<br />

kg disolvente<br />

i =<br />

ni<br />

L disolución<br />

i<br />

• Unidades: mol⋅kg -1 (molal,m)<br />

Tema <strong>10</strong>.- <strong>Disoluciones</strong>.<br />

Tema <strong>10</strong>.- <strong>Disoluciones</strong><br />

• Representa el tanto por uno en moles de i<br />

• Adimensional<br />

• 0 ≤ xi ≤ 1; xi<br />

= 1<br />

∑<br />

i<br />

• Unidades: mol⋅L -1 (molar,M)<br />

• Ventaja: Facilidad para medir V<br />

4

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