List active metals that can be extracted from their compounds by electrolysis.
aluminium,copper,zink.
To list active metals that can be extracted from their compounds by electrolysis, we need to identify metals that are more reactive than hydrogen in the electrochemical series. When a metal is more reactive than hydrogen, it means that it has a greater tendency to lose electrons and form positive ions.
One way to determine the activity of a metal is by referring to the reactivity series. In the reactivity series, metals are arranged based on their reactivity, with the most reactive metals at the top. Metals higher in the series can displace metals lower in the series from their compounds.
Here is a list of some active metals that can be extracted from their compounds by electrolysis:
1. Sodium (Na): Sodium is highly reactive and can be extracted from its compounds, such as sodium chloride (NaCl).
2. Potassium (K): Potassium is another very reactive metal that can be obtained by electrolyzing its compounds, like potassium chloride (KCl).
3. Calcium (Ca): Calcium is moderately reactive and can be extracted from calcium chloride (CaCl2).
4. Magnesium (Mg): Magnesium is less reactive than sodium and potassium but can still be extracted through electrolysis of its compounds, such as magnesium chloride (MgCl2) or magnesium oxide (MgO).
5. Aluminum (Al): Aluminum is extracted from its compound, aluminum oxide (Al2O3), through a process called the Hall-Héroult process, which involves electrolysis.
Note that this is not an exhaustive list, and there are other active metals that can be extracted by electrolysis. The selection of metals often depends on factors such as availability, cost, and specific applications.