F4X - Identifying Cations and Anions

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

• Na
• Li+
• Cu2+
• Ca

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+

Tags

NGSS.HS-PS1-1

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+

Tags

NGSS.HS-PS1-2

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

• Fe2+
• Fe3+
• Cu2+
• Na+

Tags

NGSS.HS-PS1-2

Anyhdrous copper sulphate is added to water. The colour change is from:

• White-Blue
• Pink-Blue
• Blue-Pink
• Blue-White

Tags

NGSS.MS-PS1-2

How do you test for hydrogen gas?

• Relight a glowing splint
• Makes a squeaky pop with a lit splint
• Turns limewater milky
• Bleaches damp limtus paper

How do you test for oxygen gas?

• Makes a squeaky pop with a lit splint
• Relights a glowing splint
• Bleaches damp litmus paper
• Turns limewater milky

How do you test for carbon dioxide gas?

• Turns limewater milky
• Relights a glowing splint
• Makes a squeaky pop with a splint
• Bleaches damp litmus paper