Problem 8 - Chemical Principles: The Quest for Insight

Question

The following compounds are often found in chemical laboratories. Name each compound. (a) \(\mathrm{SiO}_{2}\) (silica); (b) \(\mathrm{SiC}\) (carborundum); (c) \(\mathrm{N}_{2} \mathrm{O}\) (a general anesthetic); (d) \(\mathrm{P}_{4} \mathrm{O}_{10}\) (a drying agent for organic solvents); (c) \(\mathrm{CS}_{2}\) (a solvent); (f) \(\mathrm{SO}_{2}\) (a bleaching agent); (g) \(\mathrm{NH}_{3}\) (a common reagent).

Step-by-Step Solution

Answer

The compounds are named as follows: (a) silica, (b) carborundum, (c) laughing gas, (d) phosphorus pentoxide, (e) carbon disulfide, (f) sulfur dioxide, (g) ammonia.

Step 1: Identify the Compound

We will look at each compound's chemical formula and identify its common name.

Step 2: Naming Compound a

The compound \(\mathrm{SiO}_{2}\) is known as silica. It is a commonly used material in industries and is the main component of sand.

Step 3: Naming Compound b

The compound \(\mathrm{SiC}\) is called carborundum. It is used as an abrasive due to its hardness.

Step 4: Naming Compound c

\(\mathrm{N}_{2}\mathrm{O}\) is commonly known as laughing gas and is used as a general anesthetic in medicine.

Step 5: Naming Compound d

\(\mathrm{P}_{4}\mathrm{O}_{10}\) is named phosphorus pentoxide and acts as a drying agent for organic solvents.

Step 6: Naming Compound e

The compound \(\mathrm{CS}_{2}\) is called carbon disulfide and is used as a solvent.

Step 7: Naming Compound f

\(\mathrm{SO}_{2}\) is sulfur dioxide, which acts as a bleaching agent.

Step 8: Naming Compound g

Finally, \(\mathrm{NH}_{3}\) is ammonia, a common reagent and building block for many synthetic products.

Key Concepts

Inorganic Chemistry

Inorganic chemistry is the study of inorganic compounds, typically those that do not contain a carbon-hydrogen (C-H) bond. Substances such as minerals, metals, and salts fall under this vast and diverse branch of chemistry, and they play a crucial role in various industries, including medicine, engineering, and environmental science.

In contrast to organic compounds, which are generally associated with living organisms, inorganic compounds are found abundantly in the Earth's crust and in the atmosphere. Students of inorganic chemistry learn about the properties, reactions, and uses of these compounds, as well as the principles governing their behavior. Understanding how to name inorganic compounds is crucial for clear communication and proper documentation in scientific work. This process involves recognizing the elements present and applying specific nomenclature rules to assign a systematic or common name to each compound.

Chemical Formulas

Chemical formulas represent the composition of a substance using the symbols from the periodic table. They convey essential information about the elements involved and the proportions of each element within a compound. A molecular formula, for example, shows the exact number of atoms of each element in a molecule, while an empirical formula indicates the simplest whole-number ratio of the constituent atoms.

Understanding chemical formulas is fundamental to inorganic chemistry. Students must comprehend the significance of subscripts and superscripts, as they provide insights into the structure and stoichiometry of compounds. For instance, in the formula \(\mathrm{SiO}_{2}\), the subscript '2' indicates that there are two oxygen atoms for every one silicon atom. This knowledge aids in making predictions about reactivity, physical properties, and the naming of compounds, which was illustrated in the step-by-step solution for naming compounds often found in a chemical laboratory.

Common Uses of Compounds

Inorganic compounds have a myriad of applications in daily life and industrial processes. Recognizing the common uses of these compounds not only enriches one's understanding of chemistry but also highlights the practical relevance of chemical knowledge.

• \(\mathrm{SiO}_{2}\) or silica is a key ingredient in creating glass and is used as a food additive.
• \(\mathrm{SiC}\), or carborundum, is utilized for its abrasive qualities in grinding applications.
• \(\mathrm{N}_{2} \mathrm{O}\), known as laughing gas, serves as a mild anesthetic during dental procedures.
• \(\mathrm{P}_{4} \mathrm{O}_{10}\), or phosphorus pentoxide, is employed to remove water in various chemical syntheses.
• \(\mathrm{CS}_{2}\), carbon disulfide, is used in the manufacture of cellophane and rayon.
• \(\mathrm{SO}_{2}\), or sulfur dioxide, has applications in preserving dried fruits and bleaching textiles.
• \(\mathrm{NH}_{3}\), ammonia, is a crucial component in fertilizers and cleaning products.

Each of these compounds carries out a specific function that leverages their chemical properties, such as reactivity or the ability to dissolve other substances, to meet the needs of various applications.