Question detail
For A-level required practical activities, which answer correctly classifies silver nitrate and barium chloride tests for ALC-5f9fe38d?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
A-level practical endorsement and required practical activities
Question
- A. Silver nitrate and barium chloride are used for anion tests, not cation tests. ALC-5f9fe38d
- B. Silver nitrate and barium chloride are routine cation tests. ALC-5f9fe38d
- C. Both tests identify transition-metal complex colours. ALC-5f9fe38d
- D. Both tests are flame tests for metal ions. ALC-5f9fe38d
Answer
Silver nitrate and barium chloride are used for anion tests, not cation tests. ALC-5f9fe38d
Explanation
The correct option is Silver nitrate and barium chloride are used for anion tests, not cation tests. ALC-5f9fe38d. Silver nitrate is used to test halide anions and barium chloride is used to test sulfate ions. This keeps anion testing separate from cation testing for Required practical 4: identify required cations and anions using test-tube reactions..
Common mistake
Identifying Ions in Test-Tube Reactions
Students often confuse the tests for cations and anions, leading to incorrect identification of ions.
To correctly identify ions, remember the specific tests for each ion type. For example, use sodium hydroxide to test for cations: add a few drops of NaOH to the solution and observe the color of any precipitate formed. For anions, add dilute acid followed by barium chloride for sulfates or silver nitrate for halides, and note the resulting precipitate color. This systematic approach will help ensure accurate identification. Keep the correction anchored to A-level required practical activities and the objective: Required practical 4: identify required cations and anions using test-tube reactions.
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