Cations and Gases Tests

A powder is placed into a bunsen burner flame. The colour of the flame is red. The ion is

• Na
• Li+
• Cu2+
• Ca

A powder is placed into a bunsen burner flame. The colour of the flame is orange red (brick-red). The ion is

• Ca2+
• Ca
• Li
• K+

A powder is placed into a bunsen burner flame. The colour of the flame is lilac. The ion is

• Na
• Li
• Li+
• Li

A powder is placed into a bunsen burner flame. The colour of the flame is orange. The ion is

• Na+
• Li+
• Ca2+
• K+

Silver nitrate and Nitric acid were mixed with an unknown solution. A white ppt formed. The formula of the ion present is

• Br-
• Cl2
• Cl-
• Br2

Silver nitrate and Nitric acid were mixed with an unknown solution. A cream ppt formed. The formula of the ion present is

• I-
• Br+
• Br-
• Cl+

Silver nitrate and Nitric acid were mixed with an unknown solution. A yellow ppt formed. The formula of the ion present is

• I2
• I+
• I-
• Br-

NaOH is added to an unknown solution. A blue ppt forms. The formula of the ion is:

• Fe
• Fe3+
• Fe2+
• Cu2+

NaOH is added to an unknown solution. A orange-brown ppt forms. The formula of the ion is:

• Fe2+
• Fe3+
• Cu2+
• Cl-

NaOH is added to an unknown solution. A green ppt forms. The formula of the ion is:

• Fe2+
• Fe3+
• Cu2+
• Na+