Testing for Ions

What is observed when NaOH is added to a solution containing copper ions?

• Blue precipitate

• Brown precipitate

• Yellow flame

• White precipitate

Fill in the blank: When NaOH is added to a solution containing iron ions, a _______ precipitate is formed.

• Blue

• Brown

• Yellow

• White

What color flame is observed in the sodium flame test?

• Blue

• Green

• Yellow

• Red

What is the result of adding dilute HCl to a solution containing carbonate ions?

• Blue precipitate

• Brown precipitate

• Yellow flame

• Effervescence

Fill in the blank: The copper test involves adding NaOH to the unknown solution and observing a _______ precipitate.

• A) Blue

• B) Brown

• C) Yellow

• D) White

What is the purpose of the sodium flame test?

• To identify chloride ions

• To observe a yellow flame

• To form a white precipitate

• To test for carbonate ions.

Which ion test involves observing a brown precipitate?

• Copper

• Iron

• Sodium

• Chloride

Fill in the blank: The chloride test results in the formation of a _______ precipitate.

• A) Blue

• B) Brown

• C) Yellow

• D) White

What is observed when BaCl₂ and HCl are added to a sulfate solution?

• Blue precipitate

• Brown precipitate

• White precipitate

• Yellow flame

Which test involves using a Bunsen burner flame?

• Copper

• Iron

• Sodium

• Chloride