Question detail
What is the result of adding ammonia to a solution containing nickel(II) ions (A-level cue b7b1cfbc focus)
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 ions in aqueous solution (A-level only)
Question
- A. A green precipitate forms
- B. A blue solution forms (A-level cue b7b1cfbc distractor 1)
- C. A white precipitate forms (A-level cue b7b1cfbc distractor 2)
- D. No visible change occurs (A-level cue b7b1cfbc distractor 3)
Answer
A green precipitate forms
Explanation
The correct option is A green precipitate forms. A green precipitate forms is correct because it supports the objective: Describe reactions of aqueous metal ions with ammonia.. The reasoning stays within Aqueous ion tests (A-level only) and avoids drifting into a similar A-Level Chemistry idea. This version is uniquely anchored to Aqueous ion tests (A-level only). Retrieval anchor: A-level cue b7b1cfbc.
Common mistake
Misidentifying Precipitate Colors
Students often incorrectly identify the colors of precipitates formed when aqueous metal ions react with ammonia, confusing them with those formed with sodium hydroxide.
To accurately describe the reactions, remember the specific colors associated with each metal ion when reacting with ammonia. For example, copper(II) ions produce a blue precipitate of copper(II) hydroxide with sodium hydroxide, but with ammonia, they form a deep blue solution of tetraamminecopper(II) complex. Always refer to reliable sources or color charts for correct identification.
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