ANION and CATION

Which of the following salts will produce a brown gas on heating?

• Lead(II) bromide
• Ammonium nitrate
• Potassium nitrate
• Zinc nitrate

Which of the following is used to test for nitrate ions?

• Iron(II) sulphate solution, dilute sulphuric acid and concentrated sulphuric acid
• Hydrochloric acid and barium chloride solution
• Nitric acid and silver nitrate solution
• Sodium hydroxide solution

Which of the following steps is NOT part of qualitative analysis?

• Cation tests
• Heat tests
• Melting point test
• Solubility

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

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 orange-brown ppt forms. The formula of the ion is:

• Fe2+
• Fe3+
• Cu2+
• Cl-

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

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

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

How do you test for Chlorine gas?

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

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