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?

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. 

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

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?

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?

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 1.73 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

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

Zn(s) + 2Ag⁺(aq) → Zn²⁺(aq) + 2Ag(s)

In electrochemistry, the anode is defined as:

AB03E07

Nitric acid is a strong acid. This means that ________.

In this experiment you will draw graphs of temperature vs. time showing how the solution temperatures vary before and after mixing. An example is shown below.

From which point on this graph should the temperature of the mixture be recorded?