Podcast
Questions and Answers
What color does Iron(II) hydroxide turn upon standing?
What color does Iron(II) hydroxide turn upon standing?
Iron(III) hydroxide is a white precipitate.
Iron(III) hydroxide is a white precipitate.
False (B)
What is the chemical formula for Sodium nitrate?
What is the chemical formula for Sodium nitrate?
NaNO3
Aluminium hydroxide (
*Al(OH)_3
) is a ______ precipitate that can dissolve in excess sodium hydroxide.
Aluminium hydroxide ( *Al(OH)_3 ) is a ______ precipitate that can dissolve in excess sodium hydroxide.
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Match the following products with their characteristics:
Match the following products with their characteristics:
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Study Notes
Metal Hydroxide Precipitates
- Iron(II) hydroxide (Fe(OH)₂) forms a greenish precipitate. It oxidizes to a brown color over time.
- Iron(III) hydroxide (Fe(OH)₃) forms a reddish-brown precipitate.
- Aluminium hydroxide (Al(OH)₃) forms a white precipitate. This precipitate dissolves in excess sodium hydroxide forming a clear solution.
Reaction Products
- Iron(II) nitrate + Sodium hydroxide → Iron(II) hydroxide + Sodium nitrate produces a greenish precipitate of iron(II) hydroxide and colorless sodium nitrate solution. The iron(II) hydroxide darkens to brown over time.
- Iron(III) chloride + Sodium hydroxide → Iron(III) hydroxide + Sodium chloride yields a reddish-brown precipitate of iron(III) hydroxide and colorless sodium chloride solution.
- Aluminium chloride + Sodium hydroxide → Aluminium hydroxide + Sodium chloride creates a white precipitate of aluminium hydroxide along with a colorless sodium chloride solution. The aluminium hydroxide is soluble in excess sodium hydroxide.
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Description
This quiz focuses on the formation and properties of various metal hydroxide precipitates, including Iron(II), Iron(III), and Aluminium hydroxides. Test your knowledge on their colors, reactions, and the products formed when they react with sodium hydroxide.
