Exercise 2: Creating an Activity Series Data Table 2. Redox Reactions of Copper,
ID: 878095 • Letter: E
Question
Exercise 2: Creating an Activity Series
Data Table 2. Redox Reactions of Copper, Lead, and Zinc.
Solid metal
Well ID
Solution
Immediate observations
30 Minute Observations
Cu
A1
Pb(NO3)2
The copper is still bronze with clear solution
Was no chemical reaction
A2
Zn(NO3)2
The copper is still bronze with clear solution
Was no chemical reaction
Pb
B1
CuSO4
See a few bubbles form around the lead turing a bronze color
Starts to rust
B2
Zn(NO3)2
The lead is silver
Nothing happen
Zn
C1
CuSO4
Mossy Zinc turn a redish orange color
Dark black with a tint of red solid substance to form on the zinc
C2
Pb(NO3)2
Mossy zinc turn a black color
Dark graysolid substance form around the zinc
Data Table 3. Potential Redox Reactions and Chemical Equations.
Metal and Metallic Solution
Reaction Occurred?
Chemical Equation
Cu + Pb(NO3)2
No
Pb + Cu(No3)2 = Cu + Pb(No3)
Cu + Zn(NO3)2
No
Cu(NO3)2 + Zn = Cu + Zn(NO3)2
Pb + CuSO4
Yes
Pb2+(aq) + SO4 2-(aq) PbSO4(s)
Pb + Zn(NO3)2
No
2 Zn + Pb(No3)2 = 2 ZnNo3 + Pb
Zn + CuSO4
Yes
CuSO4 + ZN = ZNSO4 + Cu
Zn + Pb(NO3)2
yes
Zn + Pb(NO) Pb + Zn(NO)
Questions
List each of the metals tested in Exercise 2. Indicate the oxidation number when each element is pure and the oxidation number when each element is in a compound.
Which of the metals in Exercise 2 was the strongest oxidizing agent? Was there an instance when this metal also acted as a reducing agent? Explain your answer using data from Data Table 3.
Which of the metals in Exercise 2 was the strongest reducing agent? Was there an instance when this metal also acted as an oxidizing agent? Explain your answer using data from Data Table 3.
Solid metal
Well ID
Solution
Immediate observations
30 Minute Observations
Cu
A1
Pb(NO3)2
The copper is still bronze with clear solution
Was no chemical reaction
A2
Zn(NO3)2
The copper is still bronze with clear solution
Was no chemical reaction
Pb
B1
CuSO4
See a few bubbles form around the lead turing a bronze color
Starts to rust
B2
Zn(NO3)2
The lead is silver
Nothing happen
Zn
C1
CuSO4
Mossy Zinc turn a redish orange color
Dark black with a tint of red solid substance to form on the zinc
C2
Pb(NO3)2
Mossy zinc turn a black color
Dark graysolid substance form around the zinc
Explanation / Answer
Metal in pure form in compound
Cu 0 +2
Pb 0 +2
Zn 0 +2
Strongest oxidising agent is the compound that undergoes redution easily. In the given reactions, the strongest oxidising agent is Cu2+ . Since in all reactions it was reduced and it oxidised other metals.There was no instance where it acted as reducing agent.
Strongest reducing agent is the compound that undergoes oxidation easily. In the given reactions, the strongest reducing agent is Zn2+ . Since in all reactions it was oxidised and it reduced other metals.There was no instance where it acted as oxidising agent.
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