cation group analysis Flashcards
DETECTION OF PRESENCE OF ELEMENT IN SAMPLE MATERIAL
cation analysis
CATION ANALYSIS IS ACCOMPLISHED THROUGH __________ REACTION BY ADDING GROUP REAGENTS
precipitation
group 1 cations
hydrocholic acids
group 2 cations
hydrogen sulfide
group 3 cations
ammonium sulfide
group 4 cations
ammonium carbonate
group 5 cations
soluble group
hydrochloric acid is aka
silver group
precipitates with HS2 in dilute mineral acid medium
hydrogen sulfide
precipitates with dilute HCl
hydrochloric acid
is an insoluble solid that emerges from a liquid solution; chemical reaction between liquids
precipitate
form precipitates with ammonium sulfide in neutral or ammoniacal medium
ammonium sulfide
2 subgroups of ammonium sulfide
aluminum subgroup and iron subgroup
a group under ammonium sulfide that is amphoteric hydroxides; insoluble BUT dissolves in excess of sodium hydroxide
aluminum subgroup
insoluble in the excess of the alkali.
iron subgroup