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Chapter 21: Problem 1

Define mineral, ore, and metallurgy.

Short Answer

Expert verified
A mineral is a naturally occurring inorganic solid with a crystal structure and a defined chemical composition. An ore is a naturally occurring solid that contains sufficient minerals with important elements including metals that can be economically extracted from the rock. Metallurgy is the science of extracting, refining, and processing metals from ores.

Step by step solution

01

Definition of Mineral

A mineral is a naturally occurring inorganic solid that has a crystal structure and a defined chemical composition. An example could be Quartz, which is made up of one part Silicon and two parts Oxygen.
02

Definition of Ore

An Ore is a naturally occurring solid material from which a metal or valuable mineral can be profitably extracted. An example of an ore is iron ore, from which iron metal can be profitably extracted.
03

Definition of Metallurgy

Metallurgy is the branch of science and technology concerned with the properties of metals and their production and purification. This includes the extraction of metals from ores, the preparation and treatment of alloys, etc.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Mineral
Minerals are the basic building blocks of rocks and the Earth's crust. They are naturally occurring, which means they are formed by natural processes. A mineral is an inorganic solid, meaning it doesn鈥檛 come from living organisms.
A hallmark of minerals is their well-defined crystal structure, which forms due to the orderly and repetitive arrangement of atoms. This gives each mineral unique physical and chemical properties.
Additionally, minerals have a defined chemical composition that can vary only within specific limits. Examples include Quartz, made of Silicon and Oxygen, and Calcite, composed of Calcium, Carbon, and Oxygen.
  • Minerals are crucial for various applications such as construction, electronics, and manufacturing.
  • A mineral's unique properties make it valuable for different industrial uses.
  • While over 4,000 minerals have been identified, only a fraction is commonly used and recognized.
Ore
Ores are special types of minerals that have significant economic value. They contain enough of a desired metal or valuable mineral to make extraction profitable. The process of identifying and mining these materials is known as prospecting and mining.
Ores need not be pure; they often contain a mix of desired metals and other minerals, including waste called gangue.
Once mined, ore undergoes processing to extract the desired material and remove impurities.
  • Common examples include iron ore, from which iron is extracted, and bauxite, from which aluminum is obtained.
  • The mining and processing of ores are critical to various industries from construction to electronics.
  • Ores are resource-rich and their discovery is crucial to maintaining a steady supply of raw materials.
Extraction of Metals
The extraction of metals from ores is a key part of metallurgy. This process involves breaking down ores to separate the metal from its ore, which typically involves several steps.
There are various techniques used to extract metals, depending on the metal's reactivity and other properties. Some common methods include:
  • Smelting: This involves heating the ore in a furnace to extract the metal. It is often used for metals like iron and copper.
  • Electrolysis: An electrical current is passed through a solution or molten form of the metal compound to separate the metal. This method is commonly used for reactive metals like aluminum.
  • Leaching: In this chemical process, the ore is treated with a suitable solvent to dissolve the metal, leaving behind impurities.
Each metal extraction process is chosen based on the specific metal's characteristics and the economic feasibility of the process.
These processes ensure that the metal can be extracted efficiently while minimizing environmental impact and maximizing economic return.

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Most popular questions from this chapter

Calculate the volume of \(\mathrm{CO}_{2}\) at \(10.0^{\circ} \mathrm{C}\) and \(746 \mathrm{mmHg}\) pressure obtained by treating \(25.0 \mathrm{~g}\) of \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) with an excess of hydrochloric acid.

Name the following minerals: (a) \(\mathrm{MgCO}_{3}\), (b) \(\mathrm{Na}_{3} \mathrm{AlF}_{6}\), (c) \(\mathrm{Al}_{2} \mathrm{O}_{3},\) (d) \(\mathrm{Ag}_{2} \mathrm{~S},\) (e) \(\mathrm{HgS},\) (f) \(\mathrm{ZnS},\) (g) \(\mathrm{SrSO}_{4}\) (h) \(\mathrm{PbCO}_{3}\) (i) \(\mathrm{MnO}_{2}\), (j) \(\mathrm{TiO}_{2}\).

The overall reaction for the electrolytic production of aluminum by means of the Hall process may be represented as $$\mathrm{Al}_{2} \mathrm{O}_{3}(s)+3 \mathrm{C}(s) \longrightarrow 2 \mathrm{Al}(l)+3 \mathrm{CO}(g)$$ At \(1000^{\circ} \mathrm{C}\), the standard free-energy change for this process is \(594 \mathrm{~kJ} / \mathrm{mol} .\) (a) Calculate the minimum voltage required to produce 1 mole of aluminum at this temperature. (b) If the actual voltage applied is exactly three times the ideal value, calculate the energy required to produce \(1.00 \mathrm{~kg}\) of the metal.

Although iron is only about two-thirds as abundant as aluminum in Earth's crust, mass for mass it costs only about one-quarter as much to produce. Why?

The pressure of gaseous \(\mathrm{Al}_{2} \mathrm{Cl}_{6}\) increases more rapidly with temperature than predicted by the ideal gas equation even though \(\mathrm{Al}_{2} \mathrm{Cl}_{6}\), behaves like an ideal gas. Explain.
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