A second-year chemistry student is asked to make up a 500.0 mL sample of 0.057 M solution of aspirin to study the rate of hydrolysis of aspirin in the digestive system. Molar mass of Aspirin, acetylsalicylic acid, C9H8O4 = 180.17 g mol-1. (a) Calculate the mass (in grams) of aspirin that the student would need to weigh out. Provide your numerical answers and units.
Question
A second-year chemistry student is asked to make up a 500.0 mL sample of 0.057 M solution of aspirin to study the rate of hydrolysis of aspirin in the digestive system. Molar mass of Aspirin, acetylsalicylic acid, C9H8O4 = 180.17 g mol-1. (a) Calculate the mass (in grams) of aspirin that the student would need to weigh out. Provide your numerical answers and units.
Solution
Para calcular la masa de aspirina necesaria para preparar una solución de 500.0 mL con una concentración de 0.057 M, se deben seguir los siguientes pasos:
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Convertir el volumen de la solución a litros:
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Calcular los moles de aspirina necesarios usando la concentración molar:
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Calcular la masa de aspirina usando la cantidad de moles y la masa molar:
Por lo tanto, la masa de aspirina que el estudiante necesita pesar es 5.135 gramos.
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