Question detail
How does the solubility of Group 2 sulfates change down the group?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Group 2, the alkaline earth metals
Question
- A. Increases
- B. Decreases
- C. Remains the same
- D. Varies randomly
Answer
Decreases
Explanation
The solubility of Group 2 sulfates decreases down the group due to increasing ionic size, which leads to a decrease in the ability to hydrate the sulfate ions effectively.
Common mistake
Misunderstanding Solubility Trends
Students often confuse the solubility trends of Group 2 hydroxides and sulfates, incorrectly stating that both increase or decrease uniformly down the group.
To clarify, remember that the solubility of Group 2 hydroxides increases down the group, while the solubility of sulfates decreases. Use this rule: 'Hydroxides are more soluble as you go down, sulfates are less soluble.'
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