18 Questions
Why are permanganate solutions reasonably stable even though the equilibrium constant favors the products?
The decomposition reaction is slow.
What catalyzes the decomposition of permanganate solutions?
Light
Which of the following is NOT a factor that catalyzes the decomposition of permanganate solutions?
Alkalis
What makes permanganate solutions moderately stable?
Presence of manganese dioxide
In what type of container should permanganate solutions be stored to maintain stability?
Dark container
What is a key characteristic of permanganate solutions when properly prepared?
Moderate stability
Which of the following is NOT a suitable auxiliary reducing agent for converting iron(III) to iron(II)?
Chromium
If a sample containing iron is dissolved, the resulting solution may contain a mixture of:
Iron(II) and iron(III) ions
To determine the iron content using a standard oxidant, the sample solution needs to be pre-treated with:
An auxiliary reducing agent
If planning to titrate with a standard reductant, the sample solution needs to be pre-treated with:
An auxiliary oxidizing agent
For an auxiliary reagent to be useful, it must:
Both (a) and (b)
Which of the following metals, when added in the presence of chloride ion, can act as an auxiliary reducing agent?
Silver
What is the purpose of introducing an excess of potassium iodide in the reaction with excess bromine?
To reduce the excess bromine
Which of the following is an example of an auxiliary reducing agent mentioned in the text?
Iron(II) ammonium sulfate
In the permanganate-oxalate titration, what is the role of the oxalate ion?
It acts as a reducing agent
Which of the following is NOT a sample problem mentioned in the text?
Determining the concentration of a sodium thiosulfate solution
In the context of the text, what is the primary purpose of oxidizing agents?
To oxidize other substances
What is the significance of the reaction between excess bromine and potassium iodide mentioned in the text?
It is used to determine the excess bromine concentration
Test your knowledge about auxiliary oxidizing agents in chemistry with this quiz from Seduco, N.A./ Technological University of the Philippines Visayas. Explore key concepts related to auxiliary oxidizing agents and enhance your understanding.
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