6092 Chapter 11 Qualitative Analysis Test for Cations

Predict the observation when NaOH is added to aluminium nitrate.

Predict the observation when excess aqueous sodium hydroxide added to aluminium nitrate.

• White ppt dissolves in excess to form a colourless solution

• White ppt insoluble in excess

Predict the observation when NaOH is added to calcium nitrate solution.

Predict the observation when excess aqueous sodium hydroxide added to calcium nitrate.

• white ppt soluble in excess to form colourless solution.

• white ppt insoluble in excess.

predict the observation when aqueous sodium hydroxide is added to copper(II) sulfate solution.

predict the observation when aqueous sodium hydroxide is added to iron(II) sulfate solution.

predict the observation when excess aqueous sodium hydroxide added to iron(II) sulfate

• green ppt dissolve in excess NaOH to form dark green solution.

• green ppt insoluble in excess NaOH

Predict the observation when aqueous sodium hydroxide is added to Iron(III) nitrate solution.

Predict the observation when excess aqueous sodium hydroxide added to iron(III) nitrate.

• red-brown ppt dissolve in excess NaOH and form dark brown solution.

• red-brown ppt insoluble in excess NaOH