Multiple Choice
Which ions are formed from the dissociation of the following compound?
10. Acids and Bases
Arrhenius Acid and Base
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Which ions are formed from the dissociation of the following compound?
A
Sr(OH)2 (s) → Sr2+ (aq) + 2 OH-
B
Sr(OH)2 (s) → Sr2+ (aq) + OH-
C
Sr(OH)2 (s) → 2 Sr+ (aq) + OH-
D
Sr(OH)2 (s) → 2 Sr+ (aq) + 2 OH-
Verified step by step guidance1
Identify the compound given in the problem: Sr(OH)2. This is strontium hydroxide, a common ionic compound.
Understand the concept of dissociation: Dissociation is the process by which an ionic compound separates into its individual ions when dissolved in water.
Determine the ions that make up Sr(OH)2: Strontium hydroxide consists of strontium ions (Sr) and hydroxide ions (OH).
Write the dissociation equation: When Sr(OH)2 dissociates, it forms Sr2+ ions and OH- ions. The balanced equation is: Sr(OH)2 (s) → Sr2+ (aq) + 2 OH- (aq).
Verify the charge balance: Ensure that the total charge on the left side of the equation equals the total charge on the right side. Sr2+ has a +2 charge and each OH- has a -1 charge, so two OH- ions balance the +2 charge of Sr2+.
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