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Which ion is indicated by a blue precipitate when treated with sodium hydroxide?
Which ion is indicated by a blue precipitate when treated with sodium hydroxide?
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Practice Questions
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Q1
Which ion is indicated by a blue precipitate when treated with sodium hydroxide?
Copper(II)
Iron(III)
Lead(II)
Zinc
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Copper(II) ions form a blue precipitate of copper(II) hydroxide when treated with sodium hydroxide.
Questions & Step-by-step Solutions
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Q
Q: Which ion is indicated by a blue precipitate when treated with sodium hydroxide?
Solution:
Copper(II) ions form a blue precipitate of copper(II) hydroxide when treated with sodium hydroxide.
Steps: 5
Show Steps
Step 1: Understand that sodium hydroxide (NaOH) is a chemical that can react with certain metal ions.
Step 2: Know that when sodium hydroxide is added to a solution containing metal ions, it can form a solid called a precipitate.
Step 3: Identify that copper(II) ions (Cu²⁺) are one type of metal ion that can react with sodium hydroxide.
Step 4: Recognize that when copper(II) ions react with sodium hydroxide, they form a blue solid called copper(II) hydroxide (Cu(OH)₂).
Step 5: Conclude that the blue precipitate indicates the presence of copper(II) ions in the solution.
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