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Chapter 11: Problem 65

Define glass. What is the chief component of glass? Name three types of glass.

Short Answer

Expert verified
Glass is a non-crystalline solid mainly made from silica. Types include soda-lime, borosilicate, and lead glass.

Step by step solution

01

Definition of Glass

Glass is a transparent or translucent non-crystalline solid material that is often brittle and used in many applications including windows, bottles, and eyewear.
02

Identify the Chief Component of Glass

The chief component of glass is silica, often found in the form of silicon dioxide (SiO鈧�), which is obtained mostly from sand.
03

Name Three Types of Glass

Three common types of glass are: 1) Soda-lime glass, which is used for windows and bottles; 2) Borosilicate glass, which is used for laboratory equipment and kitchenware due to its resistance to thermal shock; and 3) Lead glass, used in decorative objects and optical lenses due to its high refractive index.

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Key Concepts

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

Silica
Silica is the primary ingredient in glass production. Chemically, it is known as silicon dioxide ( SiO鈧� ), which is abundantly found in nature, particularly in sand. This compound forms the basic structure of glass by undergoing a high-temperature melting and cooling process to become a solid. Silica is responsible for giving glass its transparency and strength.

In its natural form, silica exists as quartz. However, when used in glass-making, it is often transformed into a non-crystalline (amorphous) form, which means it does not have a definite geometric shape. This is what distinguishes glass from other crystalline solids such as quartz or sand itself.
  • Silica: The foundational element for glass production.
  • Exists in abundance in sand.
  • Transforms from crystalline (quartz) to amorphous during melting.
Soda-Lime Glass
Soda-lime glass is the most common form of glass, making up about 90% of all glass products. Its composition includes silica, sodium carbonate (soda), and calcium oxide (lime). This combination makes soda-lime glass affordable and easy to manufacture.

The addition of soda lowers the melting point of silica, making the glass easier to shape. Lime helps make the glass water-resistant and durable. This type of glass is typically used in everyday items like windows, bottles, and even some types of tableware.
  • The most prevalent form of glass.
  • Contains silica, soda, and lime.
  • Used in windows and bottles.
Borosilicate Glass
Borosilicate glass is well-known for its durability and resistance to thermal shock, making it ideal for laboratory equipment and cooking ware. It contains silica and boron trioxide in its composition. The boron content allows the glass to withstand quick temperature changes, preventing cracking.

Because of its unique properties, borosilicate glass is used in harsh environments where other types of glass would not perform as well. It is highly valued in scientific settings because it provides a clear view of contents while being resistant to heat and chemicals.
  • Composed of silica and boron trioxide.
  • Withstands thermal shock.
  • Used in labs and kitchens.
Lead Glass
Lead glass, also known as crystal glass, is admired for its brilliance and high refractive index. The addition of lead oxide to the glass mixture enhances its optical properties, making it ideal for decorative purposes and optical lenses.

This type of glass is heavier than other types due to the presence of lead. Its ability to disperse light more effectively gives it a sparkling clarity that is desired in making high-quality glassware and ornaments.
  • Contains lead oxide.
  • High refractive index and brilliance.
  • Used in decoration and optics.

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Most popular questions from this chapter

Estimate the molar heat of vaporization of a liquid whose vapor pressure doubles when the temperature is raised from \(75^{\circ} \mathrm{C}\) to \(100^{\circ} \mathrm{C}\).

The distance between layers in an \(\mathrm{NaCl}\) crystal is \(282 \mathrm{pm} . \mathrm{X}\) rays are diffracted from these layers at an angle of \(23.0^{\circ} .\) Assuming that \(n=1,\) calculate the wavelength of the \(\mathrm{X}\) rays in nanometers.

A \(1.20-\mathrm{g}\) sample of water is injected into an evacuated \(5.00-\mathrm{L}\) flask at \(65^{\circ} \mathrm{C}\). What percentage of the water will be vapor when the system reaches equilibrium? Assume ideal behavior of water vapor and that the volume of liquid water is negligible. The vapor pressure of water at \(65^{\circ} \mathrm{C}\) is \(187.5 \mathrm{mmHg}\).

Why are metals good conductors of heat and electricity? Why does the ability of a metal to conduct electricity decrease with increasing temperature?

Describe and give examples of the following types of crystals: (a) ionic crystals, (b) covalent crystals, (c) molecular crystals, (d) metallic crystals.
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