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Chapter 1: Problem 23

Is it possible to have a mixture of compounds? If yes, give an example.

Short Answer

Expert verified
Yes, it is possible to have a mixture of compounds, as they can be combined without undergoing any chemical reactions while retaining their chemical identity. An example of a mixture of compounds is air, which consists of various compounds like nitrogen (N2), oxygen (O2), carbon dioxide (CO2), and trace amounts of other compounds such as argon and water vapor (H2O).

Step by step solution

01

Understand Compounds and Mixtures

A compound is a substance composed of two or more different types of atoms, chemically bonded together in a definite proportion. Mixtures are formed when two or more substances are combined without any chemical reaction. In a mixture, each substance retains its chemical identity.
02

Identify the possibility of a mixture of compounds

It is possible to have a mixture of compounds, as compounds themselves are substances and can be mixed with other compounds without undergoing any chemical reactions, as long as they are physically-compatible.
03

Provide an example of a mixture of compounds

One example of a mixture of compounds is air. Air is a mixture of different compounds like nitrogen (N2), oxygen (O2), carbon dioxide (CO2), and trace amounts of other compounds like argon and water vapor (H2O). These compounds coexist together without any chemical reactions happening between them under normal conditions, making them a mixture.

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Key Concepts

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

Compounds
In chemistry, a compound is a type of pure substance. It consists of two or more different elements that are chemically combined in fixed proportions. This means each compound has a specific formula and different physical and chemical properties compared to its constituent elements.
For example, water (H2O) is a compound made from hydrogen and oxygen in a 2:1 ratio. Once the atoms bond chemically, the compound has its own unique properties separate from hydrogen and oxygen.
  • Compounds always have the same composition regardless of where they are found.
  • Each compound has its own chemical formula that represents the actual number of atoms of each element.
Chemical Reactions
Chemical reactions are the processes where substances transform into different substances. During a reaction, the bonds between atoms in the reactants break, and new bonds form to create the products. This transformation changes the chemical identity of the substances involved.
A clear example would be the combustion of hydrogen with oxygen to form water. Two hydrogen molecules react with one oxygen molecule to create two water molecules, changing the original atomic arrangement and properties.
  • Chemical reactions influence the properties of the involved substances.
  • They always involve energy changes, often in the form of heat or light.
Air as a Mixture
Air is a fascinating example of a mixture in our everyday environment. This mixture primarily consists of nitrogen ( N_2 ) and oxygen ( O_2 ) along with small amounts of other substances such as carbon dioxide ( CO_2 ), argon, and water vapor ( H_2O ). What makes it a mixture is that these compounds exist together physically yet retain their individual chemical identities.
In mixtures like air, there is no chemical bonding between the components, meaning they maintain their own properties. That's why the presence of gases like O_2 is crucial for life, allowing us to breath and perform cellular respiration.
  • Mixtures like air let components maintain their original chemical structures.
  • They don't require specific ratios of their components, unlike compounds.
Chemical Identity
The term "chemical identity" refers to the unique composition and structure of a substance, defining its specific properties. For a given substance, its chemical identity dictates how it behaves under different conditions and how it interacts with other substances.
The identity is determined by the type of atoms, their arrangement, and the bonds holding them together. For example, even though both water ( H_2O ) and hydrogen peroxide ( H_2O_2 ) have hydrogen and oxygen atoms, the different ratios and structures completely change their chemical identities and properties.
  • The chemical identity helps in distinguishing between substances even if they contain similar elements.
  • It provides insights into how a substance will react chemically.

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Most popular questions from this chapter

Compounds have properties that are different from those of their constituent elements. Discuss a real example to support this statement.

The smallest possible piece of the sugar glucose has twice as many hydrogen atoms as oxygen atoms or carbon atoms. Given that glucose has six carbon atoms, write its chemical formula with carbon first, then hydrogen, then oxygen.

When is a mixture not a solution?

All the metals in the first column of the periodic table react with water because they all have a single electron in their outermost occupied electron shell. This statement is an example of a scientific _____ .(law or theory)

In the United States, most basic chemical research (science) is funded by the government, but most of the money spent on applying scientific knowledge (technology) comes from industry. Why do you suppose industry is reluctant to fund basic research?
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