pract Flashcards
always wash used equipment w/ deionised
if ask add Barium Chloride
same, Barium Nitrate test
- nitric acid + barium nitrate
- hydrochloric acid + barium chloride
MUST ADD SAME ANION ACID FOR ACIDIFICATION
prevent contamination
if smth not given in pract, means…
NO NEED THIS!!
i.e. no limewater = no carbon dioxide gas
powder given
hydrogen/co2/o2 test?
Carbonate
Co2 Test
silvery/shiny
hydrogen/co2/o2 test?
hydrogen test
acidify
hydrogen/co2/o2 test?
co2 test
generic solution S given
hydrogen/co2/o2 test?
co2
add (soln.) Slowly
add few drops
add (soln.) until no further change, seen
add in excess
1/2 test tube
when add hydrogen peroxide
must do what?
test o2
no change
no visible change
for every action done in pract, there is…
1 observation
what to note down when filtering
appearance filtrate, residue
what to write down for pract
- hot/cold
- gas is pungent (ONLY smell in pract, chlorine//ammonia)
- colour
- mixture dissolve, _ solution
- no change observed
how to write co2/h2/o2 gas released in exam
colourless, odorless gas produced
amend all mistakes
light blue ppt
soluble in excess
light blue ppt formed
soluble in excess Aq ammonia to give dark blue soln.
