Question detail
Why is barium sulfate used in medical imaging despite barium compounds being toxic?
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. It is insoluble in water
- B. It is highly reactive
- C. It has no side effects
- D. It is easily absorbed by the body
Answer
It is insoluble in water
Explanation
Barium sulfate is used in medical imaging because it is insoluble in water, which means it does not dissolve in the body and can safely outline the gastrointestinal tract without being absorbed.
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.'
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.