Inorganic Observations and Deductions Flashcards
(1) Appearance
a) White crystalline solid
b) Blue crystalline solid
c) Pale green crystalline solid
d) Red-brown crystalline
a) Compound of Group I, Group 2, or ammonium
b) Copper(II) compound
c) Iron(II) compound
d) Iron(III) compound
(2) Solubility in water
a) Dissolves to form a colourless solution
b) Dissolves to form a coloured solution
i) Blue
ii) Pale green
iii) Yellow
a) Soluble in water; compound of Group I, Group II, aluminium, zinc, or ammonium
b) Soluble in water
i) Copper(II) ions present
ii) Iron(II) ions present
iii) Iron(III) ions present
(3) Flame test
a) Crimson flame
b) Yellow/orange flame
c) Lilac flame (pink through cobalt blue glass)
d) Brick red flame
e) Green flame
f) Blue-green flame
a) Lithium ions present
b) Sodium ions present
c) Potassium ions present
d) Calcium ions present
e) Barium ions present
f) Copper(II) ions present
(4) Concentrated sulfuric acid
a) Misty fumes; white smoke when glass rod dipped in concentrated ammonia solution is applied
b) Misty fumes; red-brown vapour
c) Misty fumes; purple vapour; rotten egg smell; yellow solid; grey-black solid on sides of test tube
a) Chloride ions present; misty fumes are hydrogen chloride; white smoke is ammonium chloride
b) Bromide ions present; misty fumes are hydrogen bromide; red-brown fumes are bromine
c) Iodide ions present; misty fumes are hydrogen iodide; purple vapour is iodine; rotten egg smell is hydrogen sulfide; yellow solid is sulfur; grey-black solid is iodine
(5) Silver nitrate solution
a) White ppt, redissolves in both dilute and concentrated ammonia solution to form colourless solution
b) Cream ppt, redissolves only in concentrated ammonia to form colourless solution
c) Yellow ppt, does not redissolve in either dilute or concentrated ammonia solution
d) No ppt
a) Chloride ions present, white ppt is silver chloride
b) Bromide ions present, cream ppt is silver bromide
c) Iodide ions present, yellow ppt is silver iodide
d) No halide ions present
(6) Barium chloride solution
a) White ppt
b) No ppt
a) Sulfate ions present, white ppt is barium sulfate
b) No sulfate ions present
(7) Dilute nitric acid
a) Effervescence; solid disappears; gas evolved turns limewater milky
b) No effervescence
a) Carbonate or hydrogencarbonate ions present; gas evolved is carbon dioxide
b) No carbonate/hydrogencarbonate ions present
(8) Magnesium nitrate/chloride solution
a) White ppt appears immediately
b) Colourless solution; white ppt appears on boiling
c) No ppt even on boiling
a) Carbonate ions present; white ppt is magnesium carbonate
b) Hydrogencarbonate ions presents; white ppt is magnesium carbonate
c) No carbonate/hydrogencarbonate ions present
(9) Potassium thiocyanate solution
a) Blood red solution
b) No change
a) Iron(III) ions present
b) No iron(III) ions present
(10) Potassium chromate(VI) solution
a) Yellow ppt, redissolves in dilute HCl, forms yellow solution
b) No ppt
a) Barium ions present
b) No barium ions present
(11) Sodium hydroxide solution
a) Pale green ppt, does not dissolve in excess NaOH solution
b) Brown ppt, does not dissolve in excess NaOH solution
c) White ppt, does not dissolve in excess NaOH solution
d) White ppt, dissolves in excess NaOH, forms colourless solution
a) Iron(II) ions present
b) Iron(III) ions present
c) Magnesium ions present
d) Either zinc or aluminium ions present
(12) Sodium hydroxide solution
Pungent gas evolved; damp UI paper turns blue; white smoke with glass rod dipped in concentrated HCl
Ammonium ions present
Ammonia gas released; alkaline
White smoke is ammonium chloride
(13) Aqueous ammonia (dilute ammonia solution)
a) White ppt, does not dissolve in excess aqueous ammonia
b) White ppt, dissolves in excess aqueous ammonia, colourless solution
c) Blue ppt, dissolves in excess aqueous ammonia, deep blue solution
a) Aluminium or magnesium ions present
b) Zinc ions present
c) Copper ions present
