Question detail
For Soluble salts, which ion focus answer best supports this Unit 4.4 objective: Explain why filtration is used after reacting an acid with an excess insoluble solid?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Reactions of acids
Question
- A. To ensure the reaction goes to completion - correct ion focus for filtration
- B. Wrong ion focus: confuses filtration with a nearby Unit 4.4 chemical change idea
- C. Wrong particle check: uses the wrong ion, electrode, acid-base term, or product for Soluble salts
- D. Wrong reaction link: does not support Explain why filtration is used after reacting an acid with an excess insoluble solid
Answer
The correct option is To ensure the reaction goes to completion - correct ion focus for filtration.
Explanation
The correct option is "To ensure the reaction goes to completion - correct ion focus for filtration" because it supports the approved learning objective: Explain why filtration is used after reacting an acid with an excess insoluble solid. The other options are incorrect or weaker because they are vague, use the wrong Chemistry context, or do not clearly explain the answer for Soluble salts.
Common mistake
Misunderstanding Filtration Purpose
Students often think that filtration is used to separate the acid from the insoluble solid instead of understanding that it is used to remove the excess insoluble solid from the solution.
Emphasize that filtration is specifically for separating the unreacted solid from the solution containing the soluble salt.
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