Pure substances, regardless of their source, always exhibit the same characteristic properties. These properties include specific melting and boiling points, density, solubility, and chemical reactivity.
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Soft drinks and soil are not single pure substances; they are mixtures composed of more than one pure substance. Soft drinks typically contain water, sugar, flavorings, and carbon dioxide, while soil is a mixture of minerals, organic matter, water, and ...
Yes, sugar is a pure substance because it contains only one kind of pure matter, which is sucrose. Its composition remains the same throughout, and it cannot be separated into simpler substances by physical processes.
Sodium chloride is considered a pure substance because it consists of only one kind of pure matter throughout its composition. It cannot be separated into simpler substances by physical processes.
Dissolved sodium chloride can be separated from water through the physical process of evaporation. By heating the solution, the water evaporates, leaving behind the solid sodium chloride.