Chapter 21: Problem 48
Write a balanced equation for the thermal decomposition of aluminum nitrate to form aluminum oxide, nitrogen dioxide, and oxygen gas.
Chapter 21: Problem 48
Write a balanced equation for the thermal decomposition of aluminum nitrate to form aluminum oxide, nitrogen dioxide, and oxygen gas.
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Get started for freeIt has been shown that \(\mathrm{Na}_{2}\) species form in the vapor phase. Describe the formation of the "disodium molecule" in terms of a molecular orbital energylevel diagram. Would you expect the alkaline earth metals to exhibit a similar property?
The following are two reaction schemes involving magnesium. Scheme I: When magnesium burns in oxygen, a white solid (A) is formed. A dissolves in \(1 M \mathrm{HCl}\) to give a colorless solution (B). Upon addition of \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) to \(\mathrm{B},\) a white precipitate is formed(C). On heating, C decomposes to \(D\) and a colorless gas is generated (E). When \(\mathrm{E}\) is passed through limewater [an aqueous suspension of \(\left.\mathrm{Ca}(\mathrm{OH})_{2}\right], \underline{\mathrm{a}}\) white precipitate appears (F). Scheme II:Magnesium reacts with \(1 M \mathrm{H}_{2} \mathrm{SO}_{4}\) to produce a colorless solution (G). Treating G with an excess of NaOH produces a white precipitate \((\mathrm{H}) . \mathrm{H}\) dissolves in \(1 M \mathrm{HNO}_{3}\) to form a colorless solution. When the solution is slowly evaporated, a white solid (I) appears. On heating I, a brown gas is given off. Identify \(\mathrm{A}-\mathrm{I}\) and write equations representing the reactions involved.
Use compounds of aluminum as an example to explain what is meant by amphoterism.
With the Hall process, how many hours will it take to deposit \(664 \mathrm{~g}\) of \(\mathrm{Al}\) at a current of \(32.6 \mathrm{~A} ?\)
What is wrong with the following procedure for obtaining magnesium?$$\begin{aligned}& \mathrm{MgCO}_{3} \longrightarrow \mathrm{MgO}(s)+\mathrm{CO}_{2}(g) \\\\\mathrm{MgO}(s)+\mathrm{CO}(g) & \longrightarrow \mathrm{Mg}(s)+\mathrm{CO}_{2}(g)\end{aligned}$$
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