DISOLUCIONES Flashcards

1
Q

Disolucion es igual a

A

disolvente (dis) + soluto (s)

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2
Q

Segun la concentracion la disolucion pde ser:

A
  • Diluidas
  • Concentradas: No saturadas y saturadas(cantidad : concentracion)
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3
Q

La concentracion se pde expresar como

A
  • Porcentaje en masa (dicho en los problemas: en peso)
  • Molaridad
  • Molalidad
  • Fracciones molares
  • Gramos/litro
  • porcentaje en volumen
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4
Q

Porcentaje en masa (dicho en los problemas como peso)

A

m soluto (s)
m solucion (dn) por 100

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5
Q

Molaridad

A

M= n soluto
v dn (L)

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6
Q

Molalidad

A

m= n s / Kg dis

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7
Q

Fracciones molares

A

X s = n s / n s + n dis
X dis = n dis / n dis + n s
X s + X dis = 1

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8
Q

Porcentaje volumen

A

% V = V s / V Dn x 100

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9
Q

Presión de vapor de un líquido

A

La presión que tiene el vapor de ese líquido cuando está en equilibrio con el líquido en un sistema cerrado

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10
Q

Ley de Raoult (Presión de vapor)

A

P dis - P dn = P dis x X s

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11
Q

Propiedades coligativas de las disoluciones

A
  • Presión de vapor
  • Aumento ebulloscópico
  • Descenso crioscópico
  • Presión osmótica
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12
Q

Aumento ebulloscópico

A

Te dis - Te dn = Constante ebulloscópica (Ke) x molalidad (m)

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13
Q

Descenso crioscópico

A

Tc dn - Tc dis = Constante crioscópica (Kc) x molalidad (m)

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14
Q

Presión osmótica

A

P x Vdn = ns x R x T
P = M x R x T

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