Mix and match
PRECIPITATION LAB
Objective
Predict double replacement reactions,
observe them, and express them as
using chemical equations, total ionic
equations, and net equations.
Make a table to list these, write the chemical
formulas, and briefly describe each solution
• A list down
– A1 Copper (II) nitrate
– A2 Nickel (II) nitrate
– A3 Cobalt (II) nitrate
• B list across
– B1 Sodium carbonate
– B2 Sodium chloride
A1:
Name
Formula
Description
A2
Name
Formula
Description
A3
Name
Formula
Description
B1:
B2:
Name
Formula
Description
Name
Formula
Description
EXAMPLE A1
• Copper (II) nitrate
• Cu(NO3)2
• Blue clear liquid
Predict products and predict if the reaction
between A and B happens
• Predict based on double
replacement
• Write formula of each
product
• Check on the solubility
chart and note
• If both dissolve, no
reaction
• If there is a precipitate,
reaction
A1:
Name
Formula
Description
A2
Name
Formula
Description
A3
Name
Formula
Description
B1:
B2:
Name
Formula
Description
Name
Formula
Description
Predict
products
Note solubility
Predict
Predict
products
Note solubility
Predict
Predict
products
Note solubility
Predict
Predict
products
Note solubility
Predict
Predict
products
Note solubility
Predict
Predict
products
Note solubility
Predict
Example
block at intersection of A1 and B1
• CuCO3 I
• NaNO3 S
• Predict reaction? + or -
Mix
• In spot plate,
set up reactions
between A and
B chemicals, 6
reactions in all
• Combine 3
drops of each in
wells of spot
plate and record
observations
A1:
Name
Formula
Description
A2
Name
Formula
Description
A3
Name
Formula
Description
B1:
B2:
Name
Formula
Description
Name
Formula
Description
Predict
products
Note solubility
Predict
products
Note solubility
Mix and
observe
Mix and
observe
Predict
products
Note solubility
Predict
products
Note solubility
Mix and
observe
Mix and
observe
Predict
products
Note solubility
Predict
products
Note solubility
Mix and
observe
Mix and
observe
Example
block at intersection of A1 and B1
• CuCO3 I
• NaNO3 S
• Predict reaction? + or • Describe what you actually see when you mix
3 drops of each chemical in the well between
them
Write
• For TWO reactions:
– Write chemical equation
– Write total ionic equation
– Write net ionic equation
• For TWO non-reactions
– Write chemical equation
– Write total ionic equation
– Explain why the reaction did not happen using the
numbered solubility rules