1. Write the overall balanced equation corresponding to this abbreviated cell notation: Cr / Cr3+ //...

1. Write the overall balanced equation corresponding to this abbreviated cell notation: Cr / Cr3+ // Pb4+ , Pb2+ / Pt (Explain Reasoning)

2. Write the abbreviated cell notation for the reaction: 2Al(s) + 3 Cd(NO3)2 => 3 Cd + 2 Al(NO3)3 (Explain Reasoning)

Solutions

Expert Solution

(1) Cr / Cr³⁺ // Pb⁴⁺ , Pb²⁺ / Pt

anodic RXN cathodic RXN

At anode oxidation takes place & at cathode reduction reaction takes place.

Anode : Cr Cr³⁺ + 3e^-

Cathode : Pb⁴⁺ +2e^- Pb²⁺

Overall cell reaction is : Pb⁴⁺ +Cr Pb²⁺ +Cr³⁺

0 +2 0 +3

(2) 2Al(s) + 3 Cd(NO₃)₂ 3 Cd + 2 Al(NO₃)₃

The two half reactions are (1) Al Al³⁺ ( oxidation at anode)

(2) Cd³⁺ Cd ( reduction at cathode)

The cell notation reaction : anodic reaction // cathode reaction

Al / Al³⁺ // Cd³⁺ / Cd

queen_honey_blossom answered 1 year ago

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