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Laabri

E-DAY PROJECT - Redox Practical Investigation

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Last updated over 1 year ago
16 Nsɛmmisa
Hyɛ no nsow a efi ɔkyerɛwfo no hɔ:

I have made and inserted gifs of the simulations for you directly into this Formative. You may use your textbook to complete this assessment.

I have made and inserted gifs of the simulations for you directly into this Formative. You may use your textbook to complete this assessment.

Part A: Reactivity Series
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Part B: Redox at the molecular level

In this simulation you can observe a redox reaction at the molecular level.

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Some metals react readily with others, displacing them out of a solution and sometimes, there is no reaction.

For these simulations you need to observe in each case whether a reaction takes place between the two metals.

Where a reaction does take place, describe your observations. You will also calculate the Eo cell value for each combination.

SIMULATION 1

The reactions of Mg with various metal solutions.

Use the simulation to observe the reactivity of magnesium in each solution.

Asemmisa {{asɛmmisaAhyɛnsode}}
1.

FOR EACH BEAKER:

FIRST record if a reaction takes place or does not take place.

SECOND If a reaction does takes place, record ALL your observations by choosing from the list of options. If there is no obvious change to the colour of a solution or the piece of metal, then no observation about the solution or piece of metal needs to be made.

  • No reaction takes place

  • Reaction takes place

  • Observation: A dark grey deposit forms on the metal

  • Observation: A silvery grey deposit forms on the metal

  • Observation: A reddish-brown deposit forms on the metal

  • Observation: The blue solution becomes lighter in colour

  • Observation: The blue solution becomes darker in colour

  • Observation: The colourless solution turns blue

  • Mg in Mg(NO3)2

  • Mg in Zn(NO3)2

  • Mg in Cu(NO3)2

  • Mg in AgNO3

Asemmisa {{asɛmmisaAhyɛnsode}}
2.

TWO observations were seen in the Mg in Cu(NO3)2 experiment. Explain why each one occurred.

Asemmisa {{asɛmmisaAhyɛnsode}}
3.

Calculate the Eo cell values for each of the redox reactions with magnesium metal. Choose the correct answer (with the correct sign) for each combination from the list of options.

  • - 3,17 V

  • - 2,71 V

  • - 1,61 V

  • - 1,56 V

  • - 1,10 V

  • - 0,46 V

  • 0,00 V

  • + 0,46 V

  • + 1,10 V

  • + 1,56 V

  • + 1,61 V

  • + 2,71 V

  • + 3,17 V

  • Mg in Mg(NO3)2

  • Mg in Zn(NO3)2

  • Mg in AgNO3

  • Mg in Cu(NO3)2

SIMULATION 2

The reactions of Cu with various metal solutions

Use the simulation to observe the reactivity of copper in each solution.

Asemmisa {{asɛmmisaAhyɛnsode}}
4.

FOR EACH BEAKER:

FIRST record if a reaction takes place or does not take place.

SECOND If a reaction takes place, record ALL your observations by choosing from the list of options. If there is no obvious change to the colour of a solution or the piece of metal, then no observation about the solution or piece of metal needs to be made.

  • No reaction takes place

  • Reaction takes place

  • Observation: A dark grey deposit forms on the metal

  • Observation: A silvery grey deposit forms on the metal

  • Observation: A reddish-brown deposit forms on the metal

  • Observation: The blue solution becomes lighter in colour

  • Observation: The blue solution becomes darker in colour

  • Observation: The colourless solution turns blue

  • Cu in Mg(NO3)2

  • Cu in Zn(NO3)2

  • Cu in Cu(NO3)2

  • Cu in AgNO3

Asemmisa {{asɛmmisaAhyɛnsode}}
5.

Calculate the Eo cell values for each of the redox reactions with copper metal. Choose the correct answer (with the correct sign) for each combination from the list of options.

  • - 3,17 V

  • - 2,71 V

  • - 1,61 V

  • - 1,56 V

  • - 1,10 V

  • - 0,46 V

  • 0,00 V

  • + 0,46 V

  • + 1,10 V

  • + 1,56 V

  • + 1,61 V

  • + 2,71 V

  • + 3.17 V

  • Cu in Mg(NO3)2

  • Cu in Zn(NO3)2

  • Cu in Cu(NO3)2

  • Cu in AgNO3

SIMULATION 3

The reactions of Zn with various metal solutions

Use the simulation to observe the reactivity of zinc in each solution.

Asemmisa {{asɛmmisaAhyɛnsode}}
6.

FOR EACH BEAKER:

FIRST record if a reaction takes place or does not take place.

SECOND If a reaction takes place, record ALL your observations by choosing from the list of options. If there is no obvious change to the colour of a solution or the piece of metal, then no observation about the solution or piece of metal needs to be made.

  • No reaction takes place

  • Reaction takes place

  • Observation: A dark grey deposit forms on the metal

  • Observation: A silvery grey deposit forms on the metal

  • Observation: A reddish-brown deposit forms on the metal

  • Observation: The blue solution becomes lighter in colour

  • Observation: The blue solution becomes darker in colour

  • Observation: The colourless solution turns blue

  • Zn in Mg(NO3)2

  • Zn in Zn(NO3)2

  • Zn in Cu(NO3)2

  • Zn in AgNO3

Asemmisa {{asɛmmisaAhyɛnsode}}
7.

Calculate the Eo cell values for each of the redox reactions with zinc metal. Choose the correct answer (with the correct sign) for each combination from the list of options.

  • - 3,17 V

  • - 2,71 V

  • - 1,61 V

  • - 1,56 V

  • - 1,10 V

  • - 0,46 V

  • 0,00 V

  • + 0,46 V

  • + 1,10 V

  • + 1,56 V

  • + 1,61 V

  • + 2,71 V

  • + 3.17 V

  • Zn in Mg(NO3)2

  • Zn in Zn(NO3)2

  • Zn in Cu(NO3)2

  • Zn in AgNO3

SIMULATION 4

The reactions of Ag with various metal solutions

Use the simulation to observe the reactivity of silver in each solution.

Asemmisa {{asɛmmisaAhyɛnsode}}
8.

FOR EACH BEAKER:

FIRST record if a reaction takes place or does not take place.

SECOND If a reaction takes place, record ALL your observations by choosing from the list of options. If there is no obvious change to the colour of a solution or the piece of metal, then no observation about the solution or piece of metal needs to be made.

  • No reaction takes place

  • Reaction takes place

  • Observation: A dark grey deposit forms on the metal

  • Observation: A silvery grey deposit forms on the metal

  • Observation: A reddish-brown deposit forms on the metal

  • Observation: The blue solution becomes lighter in colour

  • Observation: The blue solution becomes darker in colour

  • Observation: The colourless solution turns blue

  • Ag in Mg(NO3)2

  • Ag in Zn(NO3)2

  • Ag in Cu(NO3)2

  • Ag in AgNO3

Asemmisa {{asɛmmisaAhyɛnsode}}
9.

Calculate the Eo cell values for each of the redox reactions with silver metal. Choose the correct answer (with the correct sign) for each combination from the list of options.

  • - 3,17 V

  • - 2,71 V

  • - 1,61 V

  • - 1,56 V

  • - 1,10 V

  • - 0,46 V

  • 0,00 V

  • + 0,46 V

  • + 1,10 V

  • + 1,56 V

  • + 1,61 V

  • + 2,71 V

  • + 3.17 V

  • Ag in Mg(NO3)2

  • Ag in Zn(NO3)2

  • Ag in Cu(NO3)2

  • Ag in AgNO3

Asemmisa {{asɛmmisaAhyɛnsode}}
10.

Conclusion:

Based on the results of Part A of this investigation, rank the metals in order from most reactive to least reactive:

  1. Zn

  2. Cu

  3. Mg

  4. Ag

SIMULATION 5

Zn in Cu(NO3)2 at the molecular level

Asemmisa {{asɛmmisaAhyɛnsode}}
11.
Mmuae Afoforo a Wobɛpaw:

Zn2+ + 2e- ➝ Zn

Zn ➝ Zn2+ + 2e-

Cu2+ + 2e- ➝ Cu

Cu ➝ Cu2+ + 2e-

Asemmisa {{asɛmmisaAhyɛnsode}}
12.

Is this reaction spontaneous or non-spontaneous?

Asemmisa {{asɛmmisaAhyɛnsode}}
13.

Explain your answer above by refering to the relative strengths of the reducing agents. Complete the explanation by dragging the appropriate substance into each step of the explanation:

  • Zn

  • Zn2+

  • Cu

  • Cu2+

  • _____ is a better reducing agent

  • than _______

  • Therefore in the presence of _____ ,

  • _______ will/will not [don't need to distinguish]

  • be readily reduced to form ________

Simulation 6

Cu in Zn(NO3)2 at the molecular level

Asemmisa {{asɛmmisaAhyɛnsode}}
14.
Mmuae Afoforo a Wobɛpaw:

Cu2+ + 2e- ➝ Cu

Zn2+ + 2e- ➝ Zn

Cu ➝ Cu2+ + 2e-

Zn ➝ Zn2+ + 2e-

Asemmisa {{asɛmmisaAhyɛnsode}}
15.

Is this reaction spontaneous or non-spontaneous?

Asemmisa {{asɛmmisaAhyɛnsode}}
16.

Explain your answer above by refering to the relative strengths of the reducing agents. Complete the explanation by dragging the appropriate substance into each step of the explanation:

  • Zn

  • Zn2+

  • Cu

  • Cu2+

  • _____ is a better reducing agent

  • than _______

  • Therefore in the presence of _____ ,

  • _______ will/will not [don't need to distinguish]

  • be readily reduced to form ________