Key Area 5: Chemical Analysis Flashcards
Qualitative analysis gives?
An indication of the identity of a chemical in a sample
Quantitative analysis determines?
The quantity of a chemical in a sample
Titration is used to?
Determine accurately the volumes of solution required to reach the end point of a chemical reaction
An indicator is normally used to show
when the end-point is reached
Titre volumes within 0.2 cm3 are considered
concordant
Standard solutions are solutions of
accurately known concentrations
Flame tests can identify
metals present in a sample
Simple tests can be used to identify
oxygen hydrogen and carbon dioxide gases
Precipitation is the reaction of
two solutions to form an insoluble salt called precipitate
When the metal compound is heated some electrons of the metal ion
gain energy
in electrolysis the negative ions will migrate to the
positive electrode
in electrolysis the positive ions will migrate to the
negative electrode
Electrolysis is used?
To break up the compound into its ions
