Chemistry

Chemistry

Problem

The reaction Zn(s)+2 HCl(aq)→ZnCl2(aq)+H2(g)\mathrm{Zn}(s)+2\,\mathrm{HCl}(aq)\rightarrow\mathrm{ZnCl_2}(aq)+\mathrm{H_2}(g) is carried out at room temperature. Which statement correctly identifies the type of reaction? a) It is a double-displacement (metathesis) reaction because Zn2+\mathrm{Zn^{2+}} and H+\mathrm{H^+} exchange partners. b) It is a precipitation reaction because ZnCl2\mathrm{ZnCl_2} forms an insoluble solid in water. c) It is an oxidation–reduction reaction because Zn\mathrm{Zn} is oxidized and H+\mathrm{H^+} is reduced. d) It is an acid–base reaction because HCl\mathrm{HCl} donates a proton to metallic Zn\mathrm{Zn}.

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