A Convenient Way to Produce Very High Purity Oxygen in the Laboratory

question 52

Short Answer

A convenient way to produce very high purity oxygen in the laboratory is to decompose KMnO₄(s)at high temperature according to the following chemical equation:
2KMnO₄(s) $\rarr$ K₂MnO₄(s)+ MnO₂(s)+ O₂(g)
If 2.50 L of O₂(g)is needed at 1.00 atm and 20.°C, what mass (in grams)of KMnO₄(s)should be decomposed? Assume the decomposition of KMnO₄(s)goes to completion.

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Definitions:

Nucleases

Enzymes that break down nucleic acids by cleaving the phosphodiester bonds between nucleotides.

Nucleotides

Organic molecules that serve as the monomers, or subunits, of nucleic acids like DNA and RNA, consisting of a base (adenine, thymine, guanine, cytosine, or uracil), a sugar molecule, and one or more phosphate groups.

Gastrocolic Reflex

Local reflex resulting in mass movement of the contents of the colon, which occurs after the entrance of food into the stomach.

Duodenocolic Reflexes

Reflexes that relate the function of the duodenum to the motility of the colon, aiding in digestion.