experiment 2: qualitative analysis of Cations Flashcards
What is the title of experiment 2
Qualitative analysis of cations
Qualitative analysis of ions involves _____ and _____ of _____ present in an _______
Detection and identification
Elements
Unknown sample
Qualitative analysis of ions is usually done based on the different _______ and ________ properties of the ions
Physical and chemical
The sample is first made _____ followed by a series of ______ that aims to _____ or form the ______ present in the sample. By doing so, this process will easily ______ and ______ the ions present in the sample
Aq
Reactions
Precipitate
Complex ions
Identify and separate
What is important to do in a given solution with more than one unknown cation
To develop an identification scheme
Who developed the most used identification scheme
Carl Remegius Fresenius
Professor fresenius was a _____ and his best known work is _____
German chemist
Qualitative analysis
Objective
Understand the basic principle on separation of cations based on their chemical properties
Apply QA to identify cations in unknown solution
Learn how to use centrifuge
Name 3 reagents
6M Sodium hydroxide
6M Sulfuric acid
6M Hydrochloride acid
6M Acetic acid
6M Ammonia
0.1M Potassium thiocyanate
0.1M Potassium ferrocyanide
Instrument used
Centrifuge
Dispose all waste in ____ and flush with plenty of _____
Sink
Water
Do not dispose any _____ in the sink
Solid
Equipments needed for this experiment
10 test tube
Wash bottle
Stirring rod
1 beaker 250ml
test solution used
all are 0.05M
sodium nitrate
copper (II) nitrate
ferric nitrate
zinc nitrate
what are the procedure
separation and confirmation of silver
separation and confirmation of copper (II)
separation of zinc from copper (II) and iron (III)
confirmation of iron (III)
confirmation of zinc (II)
