Salts Flashcards
(28 cards)
Salts are
**ionic ** compounds
THEY CONTAIN A ANION AND CATION
State 2 methods to create soluble salt
- Reacting an acid with a metal, insoluble base/carbonate
- Titration
How to create insoluble salt?
Precipitation
mixing 2 solutions to form an insoluble solid that separates from the reaction mixture
When Zn2+ ion, Al3+ ion or Pb2+ ion is reacted with NaOH, what happens?
Few drops:
white ppt
Excess:
dissolve to form colourless solution
Reaction when Ca2+ ion reacted with NaOH…
Few drops:
white ppt
Excess:
ppt insoluble in excess
Reaction when Cu2+ ion reacted with NaOH…
Few drops:
light blue ppt
Excess:
ppt insoluble in excess
Reaction when Fe2+ ion reacted with NaOH…
few drops:
green ppt
Excess:
ppt insoluble in excess
Reaction when Fe3+ ion reacted with NaOH…
few drops:
reddish brown ppt
Excess:
ppt insoluble in excess
Reaction when NH4+ ion reacted with NaOH…
few drops:
no ppt
excess:
no change observed
Reaction when Ca2+ ion reacted with NH3…
few drops:
no ppt
excess:
no ppt
Reaction when Al3+ & Pb2+ ion reacted with NH3…
few drops:
white ppt
excess:
ppt insoluble in excess
Reaction when Zn2+ ion reacted with NH3…
few drops:
white ppt
Reaction when Zn2+ ion reacted with NH3…
few drops:
white ppt
excess:
ppt dissolve to form colourless solution
Reaction when Cu2+ ion reacted with NH3…
few drops:
light blue ppt
excess:
ppt dissolve to form deep blue solution
Reaction when Fe2+ ion reacted with NH3…
few drops:
green ppt
excess:
ppt insoluble
Reaction when Fe3+ ion reacted with NH3…
few drops:
reddish brown ppt
excess:
ppt insoluble
Identify H2 gas
no colour no smell
test with lighted splint
lighted splint extinguish with pop
Identify O2 gas
no colour no smell
test with glowing splint
glowing splint rekindle
Identify Co2 gas
no colour no smell
bubble gas through limewater
white ppt formed
Identify Cl2 gas
greenish yellow gas
pungent smell
moist red litmus paper turn blue then bleached
Identify SO2 gas
colourless but pungent smell
Use KMnO4 turn colourless
Identify NH3 gas
colourless but pungent smell
Moist red litmus paper turn blue
Identify CO3 ion
add dilute HCL
pass gas into limewater
white ppt observed
Identify NO3- ion
add NaOH then piece of Al foil
effervescence and red litmus paper turns blue
