Consider the symbolic equation below (state symbols are deliberately omitted)

CHEMISTRY · Single correct · A Level · Chemistry · Reactions of ions in aqueous solution · Reactions of ions in aqueous solution

Problem

Consider the symbolic equation below (state symbols are deliberately omitted). CaCl2_2 + H2_2SO4_4 → CaSO4_4 + 2 HCl Which of the following net ionic equations is most consistent with the actual reaction that occurs when these two solutions are mixed? (a) 2 H++SO42−→H2SO4(l)2\,\mathrm{H}^{+}+ \mathrm{SO}_4^{2-} \rightarrow \mathrm{H}_2\mathrm{SO}_4(l) (b) Ca2++SO42−→CaSO4(s)\mathrm{Ca}^{2+}+ \mathrm{SO}_4^{2-} \rightarrow \mathrm{CaSO}_4(s) (c) Ca2++2 Cl−→CaCl2(s)\mathrm{Ca}^{2+}+2\,\mathrm{Cl}^{-} \rightarrow \mathrm{CaCl}_2(s) (d) Ca2++2 Cl−+2 H++SO42−→CaSO4(s)+2 HCl(aq)\mathrm{Ca}^{2+}+2\,\mathrm{Cl}^{-}+2\,\mathrm{H}^{+}+\mathrm{SO}_4^{2-} \rightarrow \mathrm{CaSO}_4(s)+2\,\mathrm{HCl}(aq)

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