Qualitative analysis of cations

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

• Al³⁺
• Ca²⁺
• K⁺
• Zn²⁺

How can aluminium sulphate and zinc sulphate solution be differentiated?

• Addition of silver nitrate solution
• Addition of aqueous ammonia
• Addition of sodium hydroxide solution
• Addition of barium chloride solution

What reagent can be used to differentiate hydrochloric acid and sulphuric acid?

• Silver nitrate solution
• Sodium hydroxide solution
• Sodium carbonate solution
• Ammonia solution

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

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following might be reactant L?

• Sodium carbonate 
• Lead(II) carbonate 
• Calcium carbonate

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

• Al(OH)₃
• Ca(OH)₂
• K(OH)
• Zn(OH)2

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

• Al³⁺
• Ca²⁺
• Pb²⁺
• Zn²⁺

A metallic ion in aqueous solution produces 
1. light blue precipitate with aqueous ammonia, soluble in excess to form deep blue solution;
2. light blue precipitate with aqueous sodium hydroxide, insoluble in excess.
What is the ion?

• Al³⁺
• Ca²⁺
• Cu²⁺
• Zn²⁺

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⁺

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

• Fe³⁺
• Fe²⁺
• Pb²⁺
• Zn²⁺