Which of the following reactions are likely to go to completion or very nearly so? (a) \(\mathrm{H}_{2} \mathrm{O}_{2}(\mathrm{aq})+2 \mathrm{I}^{-}(\mathrm{aq})+2 \mathrm{H}^{+}(\mathrm{aq}) \longrightarrow\) \(\mathrm{I}_{2}(\mathrm{s})+2 \mathrm{H}_{2} \mathrm{O}(1)\) (b) \(\mathrm{O}_{2}(\mathrm{g})+2 \mathrm{H}_{2} \mathrm{O}(1)+4 \mathrm{Cl}^{-}(\mathrm{aq}) \stackrel{-}{\longrightarrow}\) \(2 \mathrm{Cl}_{2}(\mathrm{g})+4 \mathrm{OH}^{-}(\mathrm{aq})\) (c) \(\mathrm{O}_{3}(\mathrm{g})+\mathrm{Pb}^{2+}(\mathrm{aq})+\mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \longrightarrow\) \(\mathrm{PbO}_{2}(\mathrm{s})+2 \mathrm{H}^{+}(\mathrm{aq})+\mathrm{O}_{2}(\mathrm{g})\) (d) \(\mathrm{HO}_{2}^{-}(\mathrm{aq})+2 \mathrm{Br}^{-}(\mathrm{aq})+\mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \longrightarrow\) \(3 \mathrm{OH}^{-}(\mathrm{aq})+\mathrm{Br}_{2}(1)\)

Step by step solution

01

Examining Reaction (a)

Looking at reaction (a), it results in the formation of solid iodine (\(I_2\)) and water. Based on our guiding principles, this reaction is likely to go to completion as formation of a solid drives the reaction to completion.

02

Examining Reaction (b)

In case of reaction (b), it seems to lead to the formation of gaseous Chlorine (\(Cl_2\)) and Hydroxide ions (\(OH^-\)). However, this reaction requires energy input to proceed since it is non-spontaneous which suggests that it might not go to completion in the absence of an external energy source.

03

Examining Reaction (c)

Upon examination of reaction (c), it is observed that solid Lead (IV) oxide (\(PbO_2\)) and Oxygen gas (\(O_2\)) are formed. Solid formation increases the likelihood of reaction proceeding to completion.

04

Examining Reaction (d)

In reaction (d), no solid, gas, or water is formed. As such, without additional information on the reaction conditions, it can't be said with confidence if the reaction will lead to completion.

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