A galvanic cell was constructed where one electrode was a Cu²⁺(aq)|Cu(s) electrode and the other was an M²⁺(aq)|M(s) electrode. The potential difference between the two electrodes was measured to be 1.03 V with the M²⁺(aq)|M(s) electrode being the more positive electrode. What is the potential of the M²⁺(aq)|M(s) electrode with respect to the standard hydrogen electrode?

Data: E°(Cu²⁺(aq)|Cu(s)) = +0.34 V

A galvanic cell constructed using an X⁺|X electrode connected to a standard copper half–cell (as used in this experiment) was found to have a cell potential of 0.45 V with the X⁺|X electrode being positive with respect to the copper electrode. Where on the number line below would you place the X⁺|X electrode?

Which of these cell diagrams correctly represents a cell in which this reaction is happening?

Mg(s) + Cu²⁺(aq) → Mg²⁺(aq) + Cu(s)

Consider an iron nail with silver wrapped onto it, immersed in an agar gel containing phenolphthalein and potassium ferricyanide. After a few minutes a pink colour appeared in the gel around the silver metal and a blue colour was observed in the gel near the tip and head of the iron nail. What is the most accurate interpretation of these observations?

A galvanic cell constructed using an X⁺|X electrode connected to a standard copper half–cell (as used in this experiment) was found to have a cell potential of 0.45 V with the X⁺|X electrode being negative with respect to the copper electrode. Where on the number line below would you place the X⁺|X electrode?

A galvanic cell was constructed where one electrode was a Cu²⁺(aq)|Cu(s) electrode and the other was an M²⁺(aq)|M(s) electrode. The potential difference between the two electrodes was measured to be 0.27 V with the copper electrode being the more positive electrode. What is the potential of the M²⁺(aq)|M(s) electrode with respect to the standard hydrogen electrode?

Data: E°(Cu²⁺(aq)|Cu(s)) = +0.34 V

Consider an iron nail with magnesium wrapped onto it, immersed in an agar gel containing phenolphthalein and potassium ferricyanide. After a few minutes a pink colour appeared in the gel around the iron nail and but no blue colour was observed in the gel. What is the most accurate interpretation of these observations?

In the corrosion experiment you will prepare iron nails which are in good contact with a piece of another metal. How will you do this?

Which of these most accurately describes how the iron nails will be cleaned in this experiment?

To avoid burns when preparing the agar solution which of these must be not touched until it has cooled? Only select correct answers, selecting incorrect answers will result in a reduced mark.