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Chapter 1: Problem 3

Musical instruments like trumpets and trombones are made from an alloy called brass. Brass is composed of copper and zinc atoms and appears homogeneous under an optical mi-croscope. The approximate composition of most brass objects is a \(2 : 1\) ratio of copper to zinc atoms, but the exact ratio varies somewhat from one piece of brass to another.(a) Would you classify brass as an element, a compound, a homogeneous mixture, or a heterogeneous mixture? (b) Would it be correct to say that brass is a solution? [ Section 1.2\(]\)

Short Answer

Expert verified
(a) Brass is a homogeneous mixture. (b) Yes, it would be correct to say that brass is a solution.

Step by step solution

01

Understanding Elements, Compounds, and Mixtures

An element is a pure substance made of only one type of atom. A compound is a pure substance made of two or more elements chemically bound together in a fixed proportion. A mixture is a combination of two or more substances that are not chemically bound together. A homogeneous mixture has a uniform composition throughout, while a heterogeneous mixture does not have a uniform composition and its components are easily distinguishable.
02

Classifying brass

Brass is composed of copper and zinc atoms, and its composition varies somewhat from one piece of brass to another. The approximate ratio of copper to zinc atoms is \(2:1\). Since brass is composed of two different types of atoms (copper and zinc) and its composition is not fixed, it cannot be considered an element or a compound. Brass appears homogeneous under an optical microscope, so it can be classified as a homogeneous mixture.
03

Determining if brass is a solution

A solution is a type of homogeneous mixture where one substance is uniformly distributed in another substance at the molecular or ionic level. In brass, copper and zinc atoms are uniformly distributed, making it a homogeneous mixture. Thus, it would be correct to say that brass is a solution. Answer: (a) Brass is a homogeneous mixture. (b) Yes, it would be correct to say that brass is a solution.

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