Multiple Choice
In general-chemistry terms, is apple juice best classified as a solution?
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6. Chemical Quantities & Aqueous Reactions
Solutions
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Which of the following is a homogeneous solution (a uniform mixture) at room temperature?
A
Saltwater made by dissolving in water
B
Oil and water shaken together
C
Granite (a mixture of different minerals)
D
A mixture of sand and water
Verified step by step guidance1
Understand the definition of a homogeneous solution: it is a mixture where the composition is uniform throughout, meaning you cannot distinguish different components visually or physically at the macroscopic level.
Evaluate each option based on this definition:
Saltwater made by dissolving NaCl in water results in NaCl ions evenly distributed throughout the water, forming a uniform single-phase solution, which is homogeneous.
Oil and water shaken together form two separate layers because they are immiscible liquids, so this mixture is heterogeneous.
Granite is a solid mixture of different minerals visibly distinguishable, so it is heterogeneous.
A mixture of sand and water has sand particles suspended or settled in water, making it non-uniform and heterogeneous.
Therefore, the only homogeneous solution at room temperature among the options is saltwater made by dissolving NaCl in water.
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