Multiple Choice
Which of the following statements about the dissolving process in water is true?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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Which statement is true about dissolving a polar substance in water?
A
Polar substances generally dissolve well in water due to favorable dipole-dipole interactions.
B
Polar substances do not dissolve in water because water is a nonpolar solvent.
C
Polar substances dissolve in water only if they are ionic compounds.
D
Polar substances dissolve in water only at very high temperatures.
Verified step by step guidance1
Recall the principle 'like dissolves like,' which means polar solvents tend to dissolve polar solutes, and nonpolar solvents tend to dissolve nonpolar solutes.
Understand that water is a polar solvent because of its bent molecular shape and the difference in electronegativity between hydrogen and oxygen, leading to a permanent dipole moment.
Recognize that polar substances have partial positive and negative charges, allowing them to interact with water molecules through dipole-dipole interactions and hydrogen bonding.
Analyze the given statements by comparing them to the concept that polar substances generally dissolve well in polar solvents like water due to these favorable interactions.
Conclude that the correct statement is the one indicating that polar substances generally dissolve well in water due to favorable dipole-dipole interactions.
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