Qualitative Analysis of Cations

Which cation gives a soluble white precipitate with excess NH₄OH?

• Ca⁺²

• Al⁺³

• Zn⁺²

• Mg⁺²

• Pb⁺²

Which cation gives an insoluble white precipitate with excess NaOH and no precipitate with sulfuric acid?

• Ca⁺²

• Al⁺³

• Zn⁺²

• Mg⁺²

• Pb⁺²

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which cation gives an bright yellow precipitate with KI?

• Ca⁺²

• Al⁺³

• Zn⁺²

• Na⁺¹

• Pb⁺²

What is the observation when potassium iodide solution is added to a lead(II) nitrate solution?

• No changes

• A white precipitate is formed

• A yellow precipitate is formed

• Effervescence is observed

A metallic ion in aqueous solution produces 
1. a green precipitate with aqueous ammonia, insoluble in excess;
2. a green precipitate with aqueous sodium hydroxide, insoluble in excess.
What is the ion?

• Al³⁺

• Fe²⁺

• Pb²⁺

• Zn²⁺

Tags

NGSS.HS-PS1-2

Which of the following chemicals can be used to test for cations?

• Aqueous ammonia

• Ammonium nitrate

• Sodium chloride

• Sodium hydroxide

When excess aqueous ammonia was added to an unknown sample, this was observed. Which cation is present?

• Cu²⁺

• Zn²⁺

• Ca²⁺

• Fe²⁺

Tags

NGSS.HS-PS1-2

When excess aqueous ammonia was added to an unknown sample, this was observed. Which cation is present?

• Cu²⁺

• Zn²⁺

• Ca²⁺

• Fe²⁺

When NaOH (aq) was added to an unknown sample, a white precipitate was formed, soluble in excess NaOH (aq), to form a colourless solution. Which cation is present?

• Cu²⁺

• Zn²⁺

• Ca²⁺

• Fe²⁺

Tags

NGSS.HS-PS1-1

When NaOH (aq) was added to an unknown sample, a white precipitate was formed, insoluble in excess NaOH (aq). Which cation is present?

• Cu²⁺

• Zn²⁺

• Ca²⁺

• Fe²⁺

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2