Question

question 24
1 pts
redox reactions involving metals often give rise to the corresponding

metal carbonate

metal anion

metal cation

metal carbene

question 25
1 pts
when zinc metal is dissolved in hydrochloric acid, a redox reaction occurs as
evidenced by the production of

zinc ions

hydronium ions

chlorine gas

zinc amalgam

Explanation:

• Question 24: In redox reactions, metals lose electrons (oxidation). When a metal loses electrons, it forms a positively - charged ion (cation). For example, in the reaction \(Zn + 2HCl=ZnCl_2 + H_2\uparrow\), \(Zn\) (metal) is oxidized to \(Zn^{2 +}\) (metal cation). Metal carbonates (\(MCO_3\)) are formed in reactions of metals with carbonic acid - related species (not redox in the simple metal - acid sense here). Metals do not form anions (negatively - charged ions) easily as they tend to lose electrons. Metal carbenes (\(M = C\)) are more complex organometallic species and not the common product of simple metal - redox reactions.
• Question 25: The reaction of zinc metal (\(Zn\)) with hydrochloric acid (\(HCl\)) is \(Zn+2HCl = ZnCl_2 + H_2\uparrow\). The production of hydrogen gas (\(H_2\)) is a clear indication of a redox reaction. Zinc ions (\(Zn^{2+}\)) are formed, but the formation of gas is a more obvious sign of a chemical reaction (redox in this case). Hydronium ions (\(H_3O^{+}\)) are present in hydrochloric acid solution (\(HCl + H_2O=H_3O^{+}+Cl^{-}\)), but their formation is not a sign of the redox reaction between \(Zn\) and \(HCl\). Chlorine gas (\(Cl_2\)) would be formed if \(Cl^{-}\) were oxidized, but in the \(Zn - HCl\) reaction, \(H^{+}\) is reduced. Zinc amalgam (\(Zn - Hg\) alloy) is formed when \(Zn\) reacts with \(Hg\) compounds, not in the \(Zn - HCl\) reaction.

Answer:

Question 24: metal cation
Question 25: (Assuming the option for hydrogen gas is missing. If we consider the given options, there is an error. But if we go by the principle of redox reaction indication (gas evolution in the context of the given reaction), and if we assume the intended answer based on the reaction \(Zn + 2HCl=ZnCl_2 + H_2\uparrow\), and among the given options, if we consider the formation of \(Zn^{2+}\) (zinc ions) as part of the redox process (but the more characteristic sign of redox (gas evolution) is not in the options. If we strictly go by the options and the fact that \(Zn^{2+}\) is formed as a result of the redox reaction ( \(Zn\) is oxidized), then for Question 25: zinc ions)