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Questions
Write two applications of electrochemical series.
Write one application of electrochemical series.
Solution
Applications of electrochemical series:
- The relative strength of reducing agents:
- The species on the right side of half-reactions are reducing agents.
- The species appearing at the bottom right side of half-reactions associated with large negative E° values are the effective electron donors. They serve as strong reducing agents.
- The strength of reducing agents increases from top to bottom as E° values decrease.
- Spontaneity of redox reactions:
- Spontaneity of redox reactions can be predicted from values of electrode potential in electrochemical series.
- If the species with a higher E° value is reduced (accepts electrons) and that with a lower E° value is oxidized (donates electrons), then the redox reaction in a galvanic cells is spontaneous.
- The standard cell potential must be positive for a cell reaction to be spontaneous under the standard conditions.
Notes
Students should refer to the answer according to their questions.
RELATED QUESTIONS
Write applications of electrochemical series.
Answer the following:
Identify oxidising agents and arrange them in order of increasing strength under standard state conditions. The standard potentials are given in parenthesis.
Al (–1.66V), Al3+(–1.66V), Cl2 (1.36V), Cd2+ (–0.4V), Fe (–0.44V), I2 (0.54V), Br- (1.09V).
Answer the following:
Which of the following species are reducing agents? Arrange them in order of increasing strength under standard state conditions. The standard potentials are given in parenthesis.
K (–2.93V), Br2(1.09V), Mg(–2.36V), Ce3+(1.61V), Ti2+(–0.37V), Ag+ (0.8 V), Ni (–0.23V).
Answer the following:
Predict whether the following reaction would occur spontaneously under standard state condition.
\[\ce{2Ag_{(s)} + Ni^{2+}_{ (aq)} -> 2Ag^{+}_{ (aq)} + Ni_{(s)}}\]
Which of the following element belongs to the actinoid series?
Which of the following metals does NOT displace zinc from it's solution?
Which element among the following is used as reducing agent for reduction of remaining three elements from their oxides?
Which metal from following has highest tendency to undergo oxidation?
The reduction potential is the tendency of an electrode to ______
Identify the weakest oxidising agent among the following.
Which of the following cannot be considered as an application of electrochemical series?
Calculate the value `"E"_"cell"^circ` at 298 K for the following cell.
\[\ce{Al | Al^{3+} (0.01 M) || Sn^{2+} (0.015 M) | Sn}\]
`"E"_("Al"^(3+)//"Al")^circ` = - 1.66 V and `"E"_("Sn"^(2+)//"Sn")^circ` = - 0.14 V
Define electrochemical series.
