Table of Contents
- 1 Why do the different metals have different methods of extraction?
- 2 Why do we need to find new ways to extract metals?
- 3 Why are different methods used to extract iron and aluminium?
- 4 Which of the following is used in metal extraction?
- 5 Which metal is easiest to extract from its ore?
- 6 Is Coke is used in metal extraction?
- 7 Which method could be used to extract calcium from the earth?
- 8 Is used in extraction of metals?
- 9 How are metals extracted from a molten ore?
- 10 Can a metal be extracted from low grade ore?
Why do the different metals have different methods of extraction?
Extraction methods The extraction method used depends upon the metal’s position in the reactivity series . In principle, any metal could be extracted from its compounds using electrolysis . However, large amounts of electrical energy are needed to do this, so electrolysis is expensive.
Why do we need to find new ways to extract metals?
In industry, an ore must contain enough metal to make mining and extraction economical. The Earth’s natural sources of ore are becoming scarce, and so new ways of extracting metals from low grade ores are being developed. A low grade ore has a low concentration of metal.
Why are different methods used to extract iron and aluminium?
The oxides of very reactive metals, such as aluminium, form stable oxides and other compounds. The oxides of less reactive metals, such as iron, form less stable oxides and other compounds. Relatively little energy is needed to reduce them to extract the metal.
What are the different ways of extracting metals?
There are 3 main methods of extracting metals from their ore. They are reduction of the ore with carbon, reduction of the molten ore by electrolysis, and reduction of the ore with a more reactive metal.
Which metal is hardest to extract from its ore?
Both iron and copper can be extracted from the ore by heating with carbon. However, iron is a more reactive metal than copper. It is therefore a little harder to extract it from its ore.
Which of the following is used in metal extraction?
Answer: Ore is used to extract metal which is economically profitable. – Minerals are the natural materials which contain metals and their compounds inside them…..
Which metal is easiest to extract from its ore?
Many metals can be reduced and extracted in a school laboratory. The easiest are iron, copper and lead.
Is Coke is used in metal extraction?
Answer:The role of coke in the extraction of iron from its oxides is that it reduces the iron oxide to molten iron metal. Coke also when burnt in the blast furnace, supplies the heat required for carrying out the extraction of iron from its oxide.
How are the less reactive metals extracted?
The less reactive metals are extracted by the reduction of their oxides by heat alone. Example: Mercury (II) sulphide ore is roasted in air when mercury (II) oxide is formed. When this mercury (II) oxide is heated to about 300oC, it decomposes to form mercury metal.
Which metal is most difficult?
The Hardest Metals in the World
- Tungsten (1960–2450 MPa) Tungsten is one of the hardest metals you will find in nature.
- Iridium (1670 MPa)
- Osmium (3920–4000 MPa)
- Chromium (687-6500 MPa)
- Titanium (716 to 2770 MPa)
Which method could be used to extract calcium from the earth?
Reactivity and extraction method
Is used in extraction of metals?
b. Chemical functions: The extraction of metal from its oxide form is based on chemical reaction with some reducing agent like carbon or hydrogen. Carbon is the most common reducing agent used in metallurgical processes in the form of coke or coal.
How are metals extracted from a molten ore?
They are reduction of the ore with carbon, reduction of the molten ore by electrolysis, and reduction of the ore with a more reactive metal. Metals such as zinc, iron and copper are present in ores as their oxides. Each of these oxides is heated with carbon to obtain the metal. The metal oxide loses oxygen, and is therefore reduced.
What do you need to know about metal extraction?
There are various economic factors you need to think about in choosing a method of reduction for a particular ore. These are all covered in detail on other pages in this section under the extractions of particular metals. What follows is a quick summary. You need to consider: the cost of the reducing agent; energy costs;
Why is extraction of reactive metals so expensive?
The more reactive the metal is, the more difficult and expensive the extraction becomes. That means that you are having to use a very expensive reducing agent to extract the titanium. As you will see if you read the page about titanium extraction, there are other problems in its extraction which also add to the cost.
Can a metal be extracted from low grade ore?
It is more expensive and wasteful to extract a metal from a low grade ore, but most high grade ores have already been used. The extraction method used depends on the metal’s position in the reactivity series. In theory, any metal could be extracted from its compounds using electrolysis.