Question detail
Explain how the solubility of Group 2 hydroxides changes down the group and provide an application of this trend.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Group 2, the alkaline earth metals
Question
Explain how the solubility of Group 2 hydroxides changes down the group and provide an application of this trend.
Answer
The solubility of Group 2 hydroxides increases down the group. For example, magnesium hydroxide is only slightly soluble, while barium hydroxide is much more soluble. This trend is important in applications such as using barium hydroxide in medicine to neutralize stomach acid.
Explanation
This answer demonstrates understanding of the solubility trend of Group 2 hydroxides and links it to a practical application, testing the student's ability to connect theoretical knowledge to real-world uses.
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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