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pishuonlain [190]
3 years ago
12

¿Cuál es la concentración en g/ml, cuando se disuelven 700 mg de Na2SO4 en 250 ml de agua destilada?

Spanish
1 answer:
cluponka [151]3 years ago
7 0

Answer:

La concentración mencionada en el ejercicio es de:

  • 2.8 x 10^{-3} g/mL de Na2SO4

Explanation:

Ya que el ejercicio te solicita una respuesta en g/mL, debes colocar los datos previamente en esas unidades para evitar contratiempos, quiero decir, el peso de Na2SO4 en gramos y el volumen del agua destilada en mililitros, como el agua ya está en dicha unidad, procedemos a convertir los miligramos del ejercicio a gramos, sabiendo que:

  • 1 mg = 0.001 g

Hacemos una regla de tres simple:

  • 1 mg = 0.001 g
  • 700 mg = x
  • \frac{700mg*0.001g}{1mg}

Cancelamos unidades y obtenemos:

  • \frac{700*0.001g}{1}
  • 0.7 g

Con las unidades adecuadas, utilizamos la fórmula de concentración:

  • Concentración = masa del soluto / volumen de solvente
  • Concentración = 0.7 g / 250 mL
  • <u>Concentración = 0.0028 g/mL de Na2SO4</u>

En notación científica sería:

  • Concentración = 2.8 x 10^{-3} g/mL de Na2SO4
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