91162 - Ions in Solution - Identifying Cations

Add 2 drops NaOH: Orange solid forms.

Add 2 drops KSCN to a new sample: Solid dissolves and a dark red clear solution forms.

• Fe³⁺

• Na⁺

• Cu²⁺

• Ag⁺

• Steps or observations are incorrect.

Add 2 drops NaOH: Orange solid forms.

Add excess NaOH: Solid dissolves and a dark red clear solution forms.

• Fe³⁺

• Na⁺

• Cu²⁺

• Ag⁺

• Steps or observations are incorrect.

Add 2 drops NaOH: No solid forms and the solution remains clear and colourless.

• Fe³⁺

• Na⁺

• Cu²⁺

• Ag⁺

• Steps or observations are incorrect.

Add 2 drops NaOH: No solid forms.

Add excess NaOH: White solid remains.

Add dilute H₂SO₄ to a new sample: No solid forms.

• Fe³⁺

• Na⁺

• Mg²⁺

• Ag⁺

• Steps or observations are incorrect.

Add 2 drops NaOH: A blue solid forms.

Add excess NaOH: White solid remains.

Add dilute H₂SO₄ to a new sample: No solid forms.

• Cu²⁺

• Na⁺

• Mg²⁺

• Ag⁺

• Steps or observations are incorrect.

Add 2 drops NaOH: A blue solid forms.

Add 2 drops NH₃ to a new sample: A blue solid forms.

Add excess NH₃: The solid remains.

• Cu²⁺

• Na⁺

• Mg²⁺

• Ag⁺

• Steps or observations are incorrect.

Add 2 drops NaOH: A green solid forms.

Add 2 drops NH₃ to a new sample: A green solid forms.

• Cu²⁺

• Fe²⁺

• Mg²⁺

• Ag⁺

• Steps or observations are incorrect.

Add 2 drops NaOH: A green solid forms.

• Cu²⁺

• Fe²⁺

• Mg²⁺

• Ag⁺

• Steps or observations are incorrect.

Add 2 drops NaOH: A blue solid forms.

Add 2 drops NH₃ to a new sample: A blue solid forms.

Add excess NH₃: The solid dissolves to form a deep blue solution.

• Cu²⁺

• Na⁺

• Mg²⁺

• Ag⁺

• Steps or observations are incorrect.

Add 2 drops NaOH: A brown solid forms.

Add 2 drops NH₃ to a new sample: A brown solid forms.

Add excess NH₃: The solid dissolves to form a clear solution.

• Fe²⁺

• Fe³⁺

• Cu²⁺

• Ag⁺

• Steps or observations are incorrect.