OBTAIN YOUR TEACHERS PERMISSION BEFORE PERFORMING
THIS EXPERIMENT
In this experiment you will be examining TYPES OF REACTIONS (RXNs) It
is very important that you MEASURE EXACT AMOUNTS OF SUBSTANCES
and FOLLOW ALL DIRECTIONS EXACTLY!!!!!!
DOUBLE REPLACEMENT REACTIONS and PRECIPITATES
PRECIPITATE - An insoluble substance that forms in a solution. (like a double replacement reaction).
INSOLUBLE- A substance that will not dissolve in a solution. Stays solid.
SO.. in a reaction we can indicate the phase of our substances.. NaCl(aq) + AgNO3(aq) NaNO3(aq) + AgCl (s)
(s) = solid (aq) or (l) = liquid (g) = gas
MATERIALS: Clean?
• GOGGLE (over eyes)
• Large Test Tubes (3)
• Test tube rack
• Chemicals
• Droppers
List of Insoluble Salts
AgCl
silver chloride (white)
silver chromate (red)
Ag2CrO4
silver iodate (white)
AgIO3
AgI
silver iodide (yellow)
barium sulfate (white)
BaSO4
Cu(OH)2 copper(II) hydroxide (blue)
Fe(OH)3 iron(III) hydroxide (red)
PbCrO4 lead(II) chromate (yellow)
lead(II) iodide (yellow)
PbI2
PbSO4
lead (II) sulfate (white)
EXPERIMENT
1. MATCH THE EQUATION TO THE EXPERIMENT (1, 2 ect)
2. BALANCE THE EQUATION
3. IDENTIFY SOLIDS (s) LIQUIDS (aq), GAS (g).
CLEAN UP!
Rinse everything else down the drain with plenty of H2O.
RETURN ALL ITEMS TO THEIR PLACE
(#___) ___Ba(NO3)2 (aq) +___Na2SO4 (aq) -> ___BaSO4 (___)+ ___NaNO3 (___)
(#___) ___CuCl2 (aq) + ___NaOH (aq) -> ___Cu(OH)2 (___)+ ___ NaCl (___)
(#___) ___Fe2SO4(aq) + ___NaOH(aq) -> ___Fe(OH)2(___) + ___Na2SO4(___)
Here is a demonstration of a cool PRECIPITATION REACTION; we can’t do this one because it involves
mercury (Hg) which is toxic.
Sodium Iodide + Mercury Chloride
HgCl2(aq)
+
2 NaI(aq) --> HgI2(s) + 2 NaCl(aq)
Look at the equation above, IDENTIFY THE ELEMENTS and COMPOUNDS.
is ___________________
is ___________________
is ___________________
is ___________________