Compare the reactions of hydrochloric acid with lead II nitrate copper II sulfate.
Compare the reactions of KI with lead II nitrate and copper
II sulfate.
2.
Compare the reactions of sodium chloride with lead II nitrate
and copper sulfate.
AB + CD —> AD + CB
The general formula for a double replacement is:
Chemical reactions involve the rearrangement of elements to form new compounds. According to the law
of conservation of matter, the products must have the
same number of atoms as the reactants. Double replacement reactions occur when the positive ion of
one compound displaces the positive ion of another
compound. So, the reaction has two compounds on the
reactant side and two on the product side. This swap
of chemical bonding partners produces two new compounds that are different from the reactants at the start.
Usually in double replacement reactions, a precipitate
forms. A precipitate is a solid that separates out of a
solution.
Name____________________________________
Double Replacement Reaction
Student Directions:
Six lab stations will be set up around the room. Each
station will have the pair of reagents indicated on the
chart to the right. We will start four students at each
station. The teacher will announce when it is time to
move to the next station.
4. What is the classification of the reactions in this lab?
React the first column with the second column.
Reactant 1
2KI
+
Safety: Wear goggles, wash your hands after the lab, and clean
up acid spills as instructed by your teacher.
1. At each station, add three drops of reactant one
and three drops of reactant two to a clean well in
the well plate. View the reaction on a piece of
white paper to accurately determine if a color
change occurred.
2. Record your observations as indicated on the data
table to the right.
3. Write the balanced equation in the space provided.
If you are not finished when it is time to rotate,
you can balance your equation at the end of lab.
4. Write the name for each compound in the data table
under its formula.
3.
1.
Reactant 2 Record observations and write a
balanced equation in the space
below.
Pb(NO3 )2
→
+ CuSO4 →
2NaCl
+ Pb(NO3)2
→
2NaCl
+ CuSO4
→
2KI
CuSO4 →
2HCl
+
Pb(NO3 )2
→
2HCl
+