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Free_Kalibri [48]
3 years ago
11

5. Para la siguiente reacción: KClO3 (s) KCl(s) + O2

Chemistry
1 answer:
iren [92.7K]3 years ago
8 0

Answer:

72.95%

Explanation:

Para resolver esta pregunta, debemos hallar las moles tóricas que se producirían en la reacción asumiendo que los 500g son únicamente de clorato de potasio haciendo uso de la reacción balanceada:

2KClO₃(s) → 2KCl(s) + 3O₂(g)

Donde dos moles de clorato de potasio producen tres moles de oxígeno.

Después de hallar las moles teóricas de oxígeno debemos hallar las moles producidas usando PV = nRT. La pureza SERÁ:

Moles producidas / moles Teóricas * 100

<em>Moles clorato -Masa molar: 122.55g/mol-:</em>

500g KClO₃ * (1mol / 122.55g) = 4.08 moles KClO₃

<em>Moles O₂ teóricas:</em>

4.08 moles KClO₃ * (3 moles O₂ / 2 moles KClO₃) = 6.12 moles

<em>Moles producidas:</em>

PV / RT = n

<em>Donde P = 1atm a STP</em>

<em>V es volumen = 100L</em>

<em>R es constante de los gases = 0.082atmL/molK</em>

<em>T =273.15K a STP</em>

<em />

Reemplazando:

1atm*100L / 0.082atmL/molK*273.15K = <em>4.46 moles</em>

<em />

La pureza de la muestra es:

4.46 moles / 6.12 moles * 100 = 72.95%

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