Quantitative Analysis of Ions (HSC SSCE Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
What are the two main approaches for quantitative ion analysis?
What are the two main approaches for quantitative ion analysis?
Precipitation titrations & gravimetric
What indicator is used in Mohr's method?
What indicator is used in Mohr's method?
Chromate ions forming red-brown
Why must pH be 6-9 in Mohr's method?
Why must pH be 6-9 in Mohr's method?
Higher pH precipitates AgOH; lower pH protonates chromate
Why is a blank titration needed in Mohr's method?
Why is a blank titration needed in Mohr's method?
End point detected past equivalence point
What type of titration is Volhard's method?
What type of titration is Volhard's method?
Back titration with excess
In Volhard's method, when must precipitate be filtered before titration?
In Volhard's method, when must precipitate be filtered before titration?
When of precipitate > of AgSCN
What color signals the end point in Volhard's method?
What color signals the end point in Volhard's method?
Blood-red complex
How do absorption indicators work in Fajan's method?
How do absorption indicators work in Fajan's method?
They adsorb onto precipitate surface
Which is a major error source in gravimetric analysis?
Which is a major error source in gravimetric analysis?
Water remaining in the precipitate
What measurements does gravimetric analysis primarily use?
What measurements does gravimetric analysis primarily use?
Mass of dried precipitate