Question

Which is evidence that the single replacement reaction shown below is also a redox reaction? Cu + 2AgNO3 → Cu(NO3)2 + 2Ag (2 points) The reaction involves the element oxygen. There are four different elements in the reaction. Silver is in a compound as a reactant, but is a pure element as a product. The nitrate ion, NO3−, does not split apart during the reaction.

Answer 1

Silver is in a compound as a reactant, but is a pure element as a product.

Answer 2

Answer: The correct answer is silver is in a compound as a reactant, but is a pure element as a product.

Explanation:

A single displacement reaction is defined as the reaction in which a more reactive metal displaces a less reactive metal from its chemical reaction. The reactivity of metals is determined from a series known as reactivity series. Metals which lie above in the series are more reactive than the metals which lie below in the series.

The general chemical equation for the following reaction follows:

$A+BC\rightarrow AC+B$

For the given chemical reaction:

$Cu(s)+2AgNO_3(aq.)\rightarrow Cu(NO_3)_2(aq.)+2Ag(s)$

In the above reaction, silver is getting reduced and copper is getting oxidized. As, silver was a compound at the reactant side and is a pure element on the product side, which shows that this element is accepting electron and its oxidation state is getting reduced from +1 to 0.

Hence, the correct answer is silver is in a compound as a reactant, but is a pure element as a product.