Why do we convert ore into metal oxide?

After the concentration of ores, the sulphide or carbonate ores of some metals are converted into metal oxides because it is easier to obtain metals from their metal oxides as compared to metal sulphides or metal carbonates.

Why sulphides are converted to oxides?

Sulphide ores are converted to oxides by heating in the presence of excess air. Carbonate and sulphide ores are usually converted into oxides during the process of extraction because extraction of metal is easier from their oxides rather than from their carbonates or sulphides.

Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?

Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them? Answer: This is because it is easier to obtain metals from their oxides (by reduction) than from carbonate or sulphide ores.

What is the purpose of roasting?

Roasting is a process of heating a sulfide ore to a high temperature in the presence of air. It is a step in the processing of certain ores. More specifically, roasting is often a metallurgical process involving gas–solid reactions at elevated temperatures with the goal of purifying the metal component(s).

How is metal converted into metal oxide?

1) It is the process by which a carbonate ore is heated strongly in the absence of air to convert into metal oxide. It is a process in which sulphide ore is heated in the presence of air to convert into metal oxide.

Which method is used to convert the ore into oxide?

Calcination
Calcination: calcination is defined as the process of converting ore into an oxide by heating it strongly. The ore is heated below its melting point either in absence of air or in limited supply. This method is commonly used for converting carbonates and hydroxides to their respective oxides.

Why is it easier to extract metals from their oxides?

It is easier to obtain a metal from its oxide as compared to its sulphide and carbonate because when we extract metal from its respective ore, we have to perform calcination or roasting step in which carbonates and sulphides of metals are converted into metal oxides.

Why are oxides easier to reduce than sulphides?

Oxygen is more electronegative than sulphur. Hence it is easier for oxides to accept the electron pair of an incoming nucleophile and get reduced than sulphides.

Why should the metal sulphides and carbonates?

Extracting a metal by reduction of its oxide with common reducing agents such as coke or CO is much easier and economical than obtaining from its sulphide or carbonate. This is the main reason that conversion of metal sulphides and carbonates to metal oxides is an important step in metallurgy.

What chemical process is used for obtaining a metal from its oxide?

Reduction method
Answer: Reduction method is used to obtain metal from its oxide. Metallic oxide is reduced to metal during the extraction of metals.

What is roasting of metal?

Roasting Definition: Roasting is a process in metallurgy in which a sulfide ore is heated in air. The process may convert a metal sulfide to a metal oxide or to a free metal. Example: Roasting ZnS may yield ZnO; roasting HgS may yield free Hg metal.

What is the importance of roasting and calcination?

While calcination is mostly used in the oxidation of carbonates, roasting is a method that is used for converting sulphide ores. During roasting, moisture and non-metallic impurities in the form of volatile gases are released.

What is oxidation roasting in smelting?

Oxidation roasting is often used in sulfide ore smelting. It is used to remove the sulfur ore, arsenic, antimony, and other harmful impurities in ore. In oxidation roasting, the sulfide ore is first decomposed into low-valence sulfide and sulfur, and then the oxide is formed.

What can we learn from the roasting of sulphides?

The roasting of these sulphides presents a good case for the study of chemical equilibrium.

Why are metals first converted to their respective oxides?

Respective metals can be easily obtained from their oxides rather than their sulphide or carbonate ores because oxygen has less affinity with metals as compared to sulphides and carbonate ores…. Therefore metals are first converted to their respective oxides…

Why are sulphides and carbonates converted to metal oxides during extraction?

It is easier to reduce a metal from its oxide as compared to its sulphides and carbonates. Hence, usually the metal sulphides and carbonates are converted to metal oxides before the reduction during the extraction process. Was this answer helpful?