Multiple Choice
Which is the correct term for compounds that do not mix with water?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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If substance A dissolves in water, which of the following statements is most accurate?
A
Substance A is soluble in water.
B
Substance A must be a nonpolar compound.
C
Substance A reacts with water to form a precipitate.
D
Substance A is insoluble in water.
Verified step by step guidance1
Understand the meaning of 'dissolves in water': When a substance dissolves in water, it means it forms a homogeneous mixture (solution) with water, indicating that the substance is soluble in water.
Recall the concept of solubility: Solubility refers to the ability of a substance to dissolve in a solvent, such as water. If a substance dissolves, it is considered soluble; if it does not, it is insoluble.
Analyze the options given: Since the substance dissolves, it cannot be insoluble or form a precipitate (which is a solid formed when a substance is not soluble).
Consider polarity: Water is a polar solvent, so substances that dissolve well in water are typically polar or ionic, not nonpolar. Therefore, the statement that the substance must be nonpolar is inaccurate.
Conclude that the most accurate statement is that the substance is soluble in water, as this directly matches the definition of dissolving.
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