Chemistry Tests Flashcards
adding sodium hydroxide and aqueous ammonium solution to ammonium
ammonia gas produced on warming
adding sodium hydroxide and aqueous ammonium solution to copper (II)
light blue ppt insoluble in excess
light blue ppt dissolves in excess ammonia, giving deep blue solution
adding sodium hydroxide and aqueous ammonium solution to iron (II)
green ppt insoluble in excess
adding sodium hydroxide and aqueous ammonium solution to iron (III)
rust brown ppt insoluble in excess
adding sodium hydroxide and aqueous ammonium solution to chromium (III)
grey green ppt, soluble in excess giving a green solution
grey green ppt insoluble in excess
adding sodium hydroxide and aqueous ammonium solution to calcium
white ppt insoluble in excess
no ppt/very slight white
adding sodium hydroxide and aqueous ammonium solution to magnesium
white ppt insoluble in excess
adding sodium hydroxide and aqueous ammonium solution to zinc
white ppt soluble in excess giving a colourless solution
white ppt insoluble in excess
adding sodium hydroxide and aqueous ammonium solution to aluminium
white ppt soluble in excess giving a colourless solution
white ppt insoluble in excess
NA+ (cations)
colourless in solution
golden yellow in flame
K+ (cations)
Colourless in solution
Lilac in flame
CA 2+ (cations)
colourless in solution
orange-red in flame
sr 2+ (cations)
colourless in solution
crimson-red in flame
ba 2+ (cations)
colourless in solution
apple-green in flame
mg 2+ (cations)
colourless in solution
bright-white in flame
cu 2+ (cations)
blue in solution
green in flame
carbonate (anion test)
add dilute HCL
fizzing, co2 produced
chloride, bromide, and iodide (anion test)
acidify with dilute HNO3 then add aq AGNO3
chloride: white ppt soluble in ammonia
bromide: off white ppy, slightly soluble in ammonia
iodide: yellowish-white ppt insoluble in ammonia
sulfate (anion test)
acidify with dilute HCL/HNO then add aq BaCL2/ Ba(OH)3
white ppt of barium sulfate
nitrate (anion test)
mix sodium alkaline with NAOH then add Al foil and warm slightly
red litmus turns blue
ammonia (gas test)
colourless, pungent smell
hold damp red litmus in the gas
indicator paper turns blue
chlorine (gas test)
pale green choking smell
hold damp litmus paper in gas
paper is bleached to white
carbon dioxide (gas test)
colourless and odourless
pass gas through limewater
limewater turns milky due to presence of CACO3
sulfur dioxide (gas test)
colourless acidic/pungent smell
add to solution of filter paper soaked in potassium manganate (VII)
potassium manganate changes from purple to colourless
hydrogen (gas test)
colourless and odourless
hold a lighted splint in the gas
pop sound is heard
oxygen (gas test)
hold a “glowing” wooden splint in the gas
“glowing” splint relights
sulfite (gas test)
add drops of acidified potassium permanganate
turns from purple to colourless
nitrates (solubility)
soluble with all cations
sodium
potassium
ammonium (solubility)
soluble with all cations
chloride, bromide and iodide (solubility)
soluble with all cations except silver, lead and mercury
hydroxide (solubility)
soluble with na+, k+, NH4+, Ca2+, Ba2+, Sr2+, Mg2+ (partially)
insoluble with all other cations
sulfides (s2-) (solubility)
soluble with na+, k+, NH4+, ca2+, Ba2+, Sr2+, Mg2+
insoluble with all other cations
carbonates (solubility)
soluble with na+, k+ and NH4+
insoluble with all other catins
phosphates (solubility)
soluble with na+, k+ and NH4+
insoluble with all other cations
sulfates (solubility)
soluble with all cations except ag+, ca2+, Ba2+, Sr2+, hg+, Hg2+ and Pb2+
