Iron(III) Ion Test Quiz

What color precipitate is formed when iron(III) ions react with sodium hydroxide?

• Yellow

• Red-brown

• Green

• Blue

What happens to the red-brown precipitate when excess sodium hydroxide is added?

• It becomes more concentrated

• It dissolves completely

• It changes color

• It remains insoluble

When ammonia is added to iron(III) ions, what is observed?

• A blue precipitate forms

• The solution turns clear

• A red-brown precipitate forms

• No reaction occurs

What is the role of ammonia in the reaction with iron(III) ions?

• It produces hydroxide ions

• It dissolves the precipitate

• It oxidizes the iron ions

• It acts as a reducing agent

What compound is formed when Fe3+ reacts with hydroxide ions?

• Iron hydroxide

• Iron(III) chloride

• Iron(II) oxide

• Iron sulfate