# Problem: Oxygen can be produced in the laboratory by the reaction 2KClO3(s) → 2KCl(s) + 3O2(g) .How much potassium chlorate is needed to produce 2.75 L of oxygen, collected over water at 37°C and 94.9 kPa? The vapor pressure of water at 37°C is 6.28 kPa.1. 0.189 mol2. 9.45 × 10−2 mol3. 0.142 mol4. 7.20 × 10−2 mol5. 6.30 × 10−2 mol

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Oxygen can be produced in the laboratory by the reaction

2KClO3(s) → 2KCl(s) + 3O2(g) .

How much potassium chlorate is needed to produce 2.75 L of oxygen, collected over water at 37°C and 94.9 kPa? The vapor pressure of water at 37°C is 6.28 kPa.

1. 0.189 mol

2. 9.45 × 10−2 mol

3. 0.142 mol

4. 7.20 × 10−2 mol

5. 6.30 × 10−2 mol

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Collecting Gas Over Water concept. If you need more Collecting Gas Over Water practice, you can also practice Collecting Gas Over Water practice problems.

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Our tutors rated the difficulty ofOxygen can be produced in the laboratory by the reaction 2KC...as high difficulty.

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Based on our data, we think this problem is relevant for Professor Sahinoglu's class at Auburn University-Montgomery.