Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425



Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem

. _________ is the process of returning metals to their natural state—the ores from which they were originally obtained. This

process involves ______ of the metal.

Interpretation Introduction


The process of returning metal t their natural state-the ore should be determined. If the metal undergo reduction or oxidation should be determined.

Concept Introduction:

The minerals containing metals are known as ores. There are different methods involved in the extraction of different types of ores. There are some common metals like iron which are smelted in the presence of carbon atoms as a reducing agent. Some of the metals such as aluminium and sodium do not have compatible reducing agent this they are extracted by the process of electrolysis. Directly metal cannot be obtained from the sulphide ores. They are reduced by the process of roasting which takes place in the presence of air and results in the formation of oxides.


Mostly metals are present in nature in compounds with non-metals for example oxygen and sulfur. In the iron ore, iron exists as its oxides. The process by which metals return to their natural state that is ore by the oxidation is known as corrosion.

For example: Corrosion of iron converts iron metal into iron oxide such as Fe

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