Q11 E - Chemistry (OpenStax)

Question

How does a homogeneous mixture differ from a pure substance? How are they similar?

Step-by-Step Solution

Answer

A pure substance is a form of matter that has a fixed chemical composition and a distinct characteristic while a homogeneous mixture is a mixture of two or more compounds with compositions that are uniform or mixed together in such a way that they are indistinguishable from each other.

Pure substances and homogeneous mixtures have the same chemical properties throughout the substance or mixture.

Defining the difference between the homogeneous mixture and pure substance

Homogeneous mixture –

• The mixture in which the constituents are blended to form a single phase in the mixture.
• Homogeneous mixture constituents have different boiling and melting point while heating the mixture different constituents boil or melt at different temperatures.
• It can be segregated into components.

Pure Substance –

• A pure substance is a matter that consists of only one kind of material.
• Pure substances boil and melt until they reach their boiling or melting point.
• It cannot be segregated further into components.

Defining the similarity between the homogeneous mixture and pure substance

• The particles are scattered equally. 
• The composition is constant throughout the mixture and substance.
• Only a single phase is included in the mixture or solution.

Ex., Air, brass, and bronze are homogeneous mixtures, and gold, baking soda, and Tin are pure substances.