Solid potassium chlorate decomposes into solid potassium chloride and oxygen gas

Question

Solid potassium chlorate decomposes into solid potassium chloride and oxygen gas. If 2.00 g potassium chlorate decomposes in a chamber with a fixed volume of 0.800L, and temperature of 25.0C. What is the final chamber pressure. Assume all the potassium chlorate decomposes. Express answer in atmospheres. Solid potassium chlorate decomposes into solid potassium chloride and oxygen gas. If 2.00 g potassium chlorate decomposes in a chamber with a fixed volume of 0.800L, and temperature of 25.0C. What is the final chamber pressure. Assume all the potassium chlorate decomposes. Express answer in atmospheres.

Explanation / Answer

Given that

potassium chlorate = 2.00 g

volume = 0.800 L

2KClO3(s) ----- > 2KCl(s) + 3O2(g)

2.00 g KClO3 x 1mole KClO3 / 122.5 g KClO3 =0.01632 MOLES KClO3

Now calculate the mole sof O2;

0.01632 MOLES KClO3

x 3 moles O2/ 2 moles KClO3 = 0.0245 moles O2

Using ideal gas law, PV = nRT

P is the pressure of the gas.

V is the volume of the gas.

Pressure(0.800 liters) = 0.0245 moles[(0.082 L atm/mole K (25 + 273 K)]

Pressure = 0.748 atmospheres

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.