Vanadium Oxidation States (AQA A-Level Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
What colour is the vanadate(V) ion in solution?
What colour is the vanadate(V) ion in solution?
Yellow
What colour is vanadium(IV) ion in solution?
What colour is vanadium(IV) ion in solution?
Blue
What colour is the vanadium(III) ion in solution?
What colour is the vanadium(III) ion in solution?
Green
What colour is the vanadium(II) ion in solution?
What colour is the vanadium(II) ion in solution?
Violet
Which metal acts as the reducing agent in this practical?
Which metal acts as the reducing agent in this practical?
Zinc
What concentration of hydrochloric acid is used?
What concentration of hydrochloric acid is used?
1.0 mol dm⁻³
What is the formula of ammonium vanadate(V)?
What is the formula of ammonium vanadate(V)?
How long should colour changes be observed for?
How long should colour changes be observed for?
15 minutes
What colour change occurs when V(V) is reduced to V(IV)?
What colour change occurs when V(V) is reduced to V(IV)?
Yellow to blue
Why is a stopper placed on the test tube after forming ?
Why is a stopper placed on the test tube after forming ?
To prevent oxidation by air