Activity 3.21:
Creating a computer worksheet the laboratory.
Decomposition of potassium chlorate(V), KClO3 by heat is often used to produce oxygen gas in the laboratory.
2KClO3(s) → 2KCl(s) + 3O2(g)
Assume you are a laboratory assistant. You are required to prepare different amounts of oxygen gas from time to time. Repeated calculations using chemical equations can be simplified using a computer worksheet. Use Microsoft Excel or other suitable programmes to prepare a computer worksheet involving the equation above to solve the following problems:
[Relative atomic mass: O = 16, Cl = 35.5, K = 39; Molar volume = 24 dm3 mol–1 at room conditions]
1. What are the masses of potassium chlorate(V), KClO3 needed to produce 1 dm3, 5 dm3, 10 dm3, 20 dm3 and 50 dm3 of oxygen gas?
2. What are the volumes of oxygen gas produced if 0.25 kg, 0.5 kg, 1 kg, 1.5 kg and 2 kg of potassium chlorate(V), KClO3 are used?
Answer:
1.
2.
Creating a computer worksheet the laboratory.
Decomposition of potassium chlorate(V), KClO3 by heat is often used to produce oxygen gas in the laboratory.
2KClO3(s) → 2KCl(s) + 3O2(g)
Assume you are a laboratory assistant. You are required to prepare different amounts of oxygen gas from time to time. Repeated calculations using chemical equations can be simplified using a computer worksheet. Use Microsoft Excel or other suitable programmes to prepare a computer worksheet involving the equation above to solve the following problems:
[Relative atomic mass: O = 16, Cl = 35.5, K = 39; Molar volume = 24 dm3 mol–1 at room conditions]
1. What are the masses of potassium chlorate(V), KClO3 needed to produce 1 dm3, 5 dm3, 10 dm3, 20 dm3 and 50 dm3 of oxygen gas?
2. What are the volumes of oxygen gas produced if 0.25 kg, 0.5 kg, 1 kg, 1.5 kg and 2 kg of potassium chlorate(V), KClO3 are used?
Answer:
1.
2.