Multiple Choice
Which statement best describes a supersaturated solution according to solubility rules?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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Which of the following substances will most likely dissociate into ions when dissolved in water?
A
NO_2
B
CaCl_2
C
C_6H_{12}O_6
D
N_2F_6
Verified step by step guidance1
Understand that substances that dissociate into ions in water are typically ionic compounds, which consist of positive and negative ions held together by ionic bonds.
Identify the nature of each substance: NO_2 and N_2F_6 are molecular compounds, C_6H_{12}O_6 (glucose) is a covalent molecular compound, and CaCl_2 is an ionic compound composed of Ca^{2+} and Cl^{-} ions.
Recall that ionic compounds like CaCl_2 dissolve in water by separating into their constituent ions, a process called dissociation, which increases the number of particles in solution and conducts electricity.
Recognize that molecular compounds such as NO_2, C_6H_{12}O_6, and N_2F_6 generally do not dissociate into ions but rather dissolve as intact molecules.
Conclude that CaCl_2 is the substance most likely to dissociate into ions when dissolved in water because it is an ionic compound.
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