Homogeneous Mixture Chemistry Example 4

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Example 4

hard
Bronze is a solid homogeneous mixture (alloy) of copper and tin. Explain why bronze is classified as a homogeneous mixture rather than a compound, even though it is a solid.

Solution

  1. 1
    In bronze, copper and tin atoms are mixed uniformly but are not chemically bonded in fixed ratios. The composition can vary (e.g., 88% Cu and 12% Sn, or 90% Cu and 10% Sn).
  2. 2
    A compound has a fixed composition defined by a chemical formula (e.g., H2O\text{H}_2\text{O} is always 2:1 H to O). Bronze has no fixed formula.
  3. 3
    The components of bronze can be separated by physical means (melting and selective solidification), confirming it is a mixture.

Answer

Bronze is a mixture: variable composition, no fixed formula, physically separable.\text{Bronze is a mixture: variable composition, no fixed formula, physically separable.}
Alloys are homogeneous mixtures of metals. They demonstrate that homogeneous mixtures can exist in all states of matter (not just as liquid solutions), and they have variable compositions unlike compounds.

About Homogeneous Mixture

A mixture with a completely uniform composition throughout, where the components are evenly distributed at the molecular level and cannot be distinguished even under a.

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Example 3 medium

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