One of the simplest types of oxidation-reduction reactions is the reaction of an

Question

One of the simplest types of oxidation-reduction reactions is the reaction of an aqueous cation with a free element. Whether or not a cation element combination will produce a net change depends on the relative tendency of the various species to gain or lose electrons. An activity series ranks elements in order of their tendency to act as reducing agents. The elements at the top of the activity series are strong reducing agents and are easily oxidized. The elements at the bottom of the series are weak reducing agents. In other words, the reactions near the bottom tend to go backward rather than forward. The activity series can be used to predict reactions using the simple guideline: Any element higher on the activity series will reduce the cation of any element lower on the activity series. An abbreviated series is shown in the following oxidation reaction strongly K te reducing Ca Ca2+ 2e Fe Fe2 2e Cu C

Explanation / Answer

Noreaction ocuurs in beakers (A) and (B)

Reaction ocuurs in beakers (C) and (D)

Pt(NO3)2 (aq.) + Cu(s) --------> Pt (s) + Cu(NO3)2 (aq.)

2 Cr (s) + 3 H2SO4 (aq.) ------------> Cr2(SO4)3 (aq.) + 6 H+ (aq.)

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