Explain that rechargeable cells run spontaneous redox reactions on discharge that are reversed by an applied current on charging, and deduce the charging reactions by reversing given discharge electrode reactions, and vice versa.
Tę umiejętność sprawdzają 4 zadania wzorowane na arkuszach IB z lat 2025–2026.
Iron and nickel can be used to design a voltaic cell. Fe(s) + Ni2+(aq) → Fe2+(aq) + Ni(s) (i) Annotate the diagram with the appropriate electrodes, electrolyte solutions and the direction of electron flow. (ii) The redox reactions in some voltaic…
Sodium ions are produced at the anode from the sodium atoms stored in the hard carbon. (i) State the half-equation for the reaction occurring at the anode while the battery discharges. (ii) The battery is rechargeable. Annotate the diagram below to show the…
Suggest why banks of sodium-ion batteries are often installed alongside wind turbines.
Which statement correctly describes a type of electrochemical cell? A. A secondary cell operates as a voltaic cell when discharging and as an electrolytic cell when it is recharged B. A primary (voltaic) cell converts electrical energy into chemical energy C.…
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