Question detail
How does the solubility of Group 2 sulfates change as you move 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 for all sulfates
- B. Decreases for all sulfates
- C. Increases for some and decreases for others
- D. Remains constant
Answer
Decreases for all sulfates
Explanation
The solubility of Group 2 sulfates decreases as you move down the group due to the increasing ionic size, which affects the hydration of the sulfate ions.
Common mistake
Solubility Confusion
Students often confuse the solubility trends of Group 2 hydroxides and sulfates, incorrectly stating that both become less soluble down the group.
To correct this, remember that Group 2 hydroxides increase in solubility down the group, while sulfates decrease in solubility. For example, barium hydroxide is more soluble than magnesium hydroxide, but barium sulfate is less soluble than magnesium sulfate. This can be summarized as follows: - Hydroxides: - Rule: Solubility increases down the group. - Example: Mg(OH)₂ (sparingly soluble) < Ca(OH)₂ (more soluble) < Ba(OH)₂ (most soluble). - Sulfates: - Rule: Solubility decreases down the group. - Example: MgSO₄ (soluble) > CaSO₄ (less soluble) > BaSO₄ (insoluble).
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.