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A student states that the reaction \(\mathrm{AgNO_3(aq)+NaCl(aq)\rightarrow AgCl(s)+NaNO_3(aq)}\) is both a precipitation reaction and a redox reaction. What is the correct evaluation of this statement?

Answer and explanation

Correct answer: It is only a precipitation/double-displacement reaction, not a redox reaction.

Ions exchange between aqueous \(\mathrm{AgNO_3}\) and \(\mathrm{NaCl}\), producing insoluble white \(\mathrm{AgCl(s)}\) as a precipitate; therefore, this is a precipitation and double-displacement reaction. The oxidation numbers remain unchanged: \(\mathrm{Ag}\) is \(+1\), \(\mathrm{Cl}\) is \(-1\), \(\mathrm{Na}\) is \(+1\), and \(\mathrm{N}\) is \(+5\). Hence, no oxidation or reduction occurs, so it is not a redox reaction. The presence of two reactants does not make it a combination reaction, since two products are formed.

Related tags

Chemical ReactionsChemical EquationsPrecipitation ReactionDouble DisplacementRedox ReactionsOxidation Numbers

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