chapter 11 : qualitative analysis 2 Flashcards
what is the test for oxygen?
hold a glowing splint in gas
what is the test for chlorine?
hold damp litmus paper in gas
what is the test for ammonia?
hold damp red litmus paper in gas
what is the test for hydrogen?
hold a lighted splint in gas
what is the test for sulfur dioxide?
bubble gas through acidified aqueous potassium manganate (VII) or bubble the gas through acidified potassium dichromate (VI) solution
what is the test for carbon dioxide?
bubble gas through limewater
what is positive test result for hydrogen?
hydrogen ignites with a squeaky ‘pop’ sound with a lighted splint
what is the positive test result for oxygen?
oxygen relights a glowing splint
what is the positive test result for sulfur dioxide?
in acidified potassium manganate (VII) solution, purple colour decolorized.
in acidified potassium dichromate (VI) solution, orange solution change to green solution.
what is the positive test result for chlorine?
chlorine bleaches damp blue litmus paper to white or paper is bleached white
what is positive result for ammonia?
paper turns blue
what is positive result for carbon dioxide?
limewater turns milky or cloudy white emulsion