A metal with a large negative standard electrode potential is
Correct answer: A. a strong reducing agent that is easily oxidised
- A. a strong reducing agent that is easily oxidised
- B. a strong oxidising agent
- C. chemically unreactive
- D. unable to form ions
Explanation
A large negative value means the metal releases electrons readily and prefers to exist as its ion, so it is easily oxidised and therefore acts as a powerful reducing agent, as lithium and potassium do. Metals at the positive end of the series, such as gold and silver, hold their electrons tightly and are unreactive. The electrochemical series is simply the reactivity series expressed in volts.
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About Standard Hydrogen Electrode
The standard hydrogen electrode provides the reference potential of 0.00 V for measuring electrode potentials. It consists of platinum in contact with hydrogen gas at standard pressure and hydrogen ions at standard concentration, usually at 25°C, and can operate as either the oxidation or reduction half-cell.
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