AQA C8 analysis questions

What solution is reacted with metal ions to make coloured precipitates?

• NaOH

• HNO₃ then AgNO₃

• HCl then BaCl₂

• HCl

Which reagent is used to test for the presence of sulfate ions by forming a white precipitate?

• NaOH

• AgNO₃ in HNO₃

• BaCl₂ in HCl

• HCl

What is the color of the precipitate formed when copper(II) ions react with NaOH?

• Blue

• Green

• Brown

• White

Which solution is used to test for the presence of chloride ions by forming a white precipitate?

• AgNO₃ in HNO₃

• NaOH

• BaCl₂ in HCl

• HCl

What is the color of the precipitate formed when iron(III) ions react with NaOH?

• Green

• Blue

• White

• Red-brown

Which reagent is used to test for the presence of carbonate ions by fizzing and forming a gas that turns limewater milky?

• NaOH

• HCl

• BaCl₂ in HCl

• AgNO₃ in HNO₃

What is the color of the precipitate formed when aluminum ions react with NaOH?

• White

• Red

• Blue

• Green

Which reagent is used to test for the presence of iodide ions by forming a yellow precipitate?

• HCl

• BaCl₂ in HCl

• NaOH

• AgNO₃ in HNO₃

Which reagent is used to test for the presence of bromide ions by forming a cream precipitate?

• BaCl₂ in HCl

• NaOH

• AgNO₃ in HNO₃

• HCl

What is the color of the precipitate formed when iron(II) ions react with NaOH?

• Blue

• White

• Brown

• Green