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Chapter 22: Problem 121

All of the following compounds yield \(\mathrm{O}_{2}(\mathrm{g})\) when heated to about \(1000 \mathrm{K}\) except (a) \(\mathrm{KClO}_{3} ;\) (b) \(\mathrm{KClO}_{4}\) (c) \(\mathrm{N}_{2} \mathrm{O} ;\) (d) \(\mathrm{CaCO}_{3} ;\) (e) \(\mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}\).

Short Answer

Expert verified
The compound that does not yield gaseous Oxygen when heated to approximately 1000 K is \(\mathrm{CaCO}_{3}\).

Step by step solution

01

Analyze KClO3

\(\mathrm{KClO}_{3}\) is Potassium Chlorate. When heated, it decomposes into Potassium Chloride and Oxygen. So, it does yield \(\mathrm{O}_{2}(\mathrm{g})\).
02

Analyze KClO4

\(\mathrm{KClO}_{4}\) is Potassium Perchlorate. This compound also decomposes into Potassium Chloride and Oxygen gas when heated, hence it also yields \(\mathrm{O}_{2}(\mathrm{g})\).
03

Analyze N2O

\(\mathrm{N}_{2} \mathrm{O}\) is Nitrous Oxide. Upon heating, it decomposes into Nitrogen gas and Oxygen gas. So, it yields \(\mathrm{O}_{2}(\mathrm{g})\) as well.
04

Analyze CaCO3

\(\mathrm{CaCO}_{3}\) is Calcium Carbonate. It decomposes into Calcium Oxide and Carbon Dioxide when heated. So, it does not yield \(\mathrm{O}_{2}(\mathrm{g})\).
05

Analyze Pb(NO3)2

\(\mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}\) is Lead Nitrate. This compound decomposes into Lead Oxide, Nitrogen Dioxide, and Oxygen gas when heated. Therefore, it does yield \(\mathrm{O}_{2}(\mathrm{g})\).

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Most popular questions from this chapter

The oxides of the phosphorus(III), antimony(III), and bismuth(III) are \(\mathrm{P}_{4} \mathrm{O}_{6}, \mathrm{Sb}_{4} \mathrm{O}_{6},\) and \(\mathrm{Bi}_{2} \mathrm{O}_{3} .\) Only one of these oxides is amphoteric. Which one? Which of these oxides is most acidic? Which is most basic?

How many grams of \(\mathrm{CaH}_{2}(\mathrm{s})\) are required to generate sufficient \(\mathrm{H}_{2}(\mathrm{g})\) to fill a \(235 \mathrm{L}\) weather observation balloon at \(722 \mathrm{mmHg}\) and \(19.7^{\circ} \mathrm{C} ?\) \(\mathrm{CaH}_{2}(\mathrm{s})+2 \mathrm{H}_{2} \mathrm{O}(1) \longrightarrow \mathrm{Ca}(\mathrm{OH})_{2}(\mathrm{aq})+2 \mathrm{H}_{2}(\mathrm{g})\).

Each of the following compounds decomposes to produce \(\mathrm{O}_{2}(\mathrm{g})\) when heated: \((\mathrm{a}) \mathrm{HgO}(\mathrm{s}) ;\) (b) \(\mathrm{KClO}_{4}(\mathrm{s})\) Write plausible equations for these reactions.

In \(1988,\) G. J. Schrobilgen, professor of chemistry at McMaster University in Canada, reported the synthesis of an ionic compound, \([\mathrm{HCNKrF}]\left[\mathrm{AsF}_{6}\right],\) which consists of \(\mathrm{HCNKr} \mathrm{F}^{+}\) and \(\mathrm{AsF}_{6}^{-}\) ions. In the \(\mathrm{HCNKr} \mathrm{F}^{+}\) ion, the krypton is covalently bonded to both fluorine and nitrogen. Draw Lewis structures for these ions, and estimate the bond angles.

Peroxonitrous acid is an unstable intermediate formed in the oxidation of \(\mathrm{HNO}_{2}\) by \(\mathrm{H}_{2} \mathrm{O}_{2}\). It has the same formula as nitric acid, HNO \(_{3}\). Show how you would expect peroxonitrous and nitric acids to differ in structure.
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