Multiple Choice
Which of the following pairs of solvents are immiscible?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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Which of the following observations provides evidence that ionic bonds formed during a precipitation reaction?
A
A color change without the formation of a solid
B
The formation of a solid from two aqueous solutions
C
An increase in temperature without any visible change
D
The evolution of a gas with a distinct odor
Verified step by step guidance1
Understand what a precipitation reaction is: it occurs when two aqueous solutions containing ions are mixed, and an insoluble solid (precipitate) forms due to the combination of certain ions.
Recall that ionic bonds form when positively and negatively charged ions attract each other to create an ionic compound, which often appears as a solid precipitate in solution.
Analyze each observation option to see which one indicates the formation of an ionic solid: a color change without a solid does not necessarily indicate ionic bond formation; an increase in temperature or gas evolution are signs of other types of reactions.
Identify that the formation of a solid from two aqueous solutions directly shows that ions have combined to form an insoluble ionic compound, which is evidence of ionic bond formation.
Conclude that the observation 'The formation of a solid from two aqueous solutions' provides evidence of ionic bonds forming during a precipitation reaction.
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