Week 14

Discuss one aspect of a comparison of a voltaic cell and an electrolytic cell.

In other words, we want to compare and contrast these two types of cells. The first person to respond choose one aspect to discuss and then the next person choose another aspect, etc.

Week 13 Question 2

Read the following article. What would you be looking for in a car that runs on a hydrogen-oxygen fuel cell?

http://phys.org/news/2014-03-nrel-hydrogen-fuel-cells.html

Week 13 Question 1

What is one concept that you are having difficulty with in Chapter 17? Why do you think that you are struggling with this concept? If you are not struggling with any topic, think of one that you think causes problems for a student and explain why.

Week 12

Start with the following question. We will make sure it is answered correctly before posting another question. If you believe that the person before you has not answered it correctly, give your answer and reasoning.

If CaCO₃, CaO and 1.0 M CO₂ are placed in a flask, will the reaction release heat energy or require heat energy at 25°C. The (delta)G°_rxn = 179.2 kJ and the (delta)H°_rxn is 131.4 kJ. Explain your reasoning!

                        CaCO₃(s)  <---->   CaO(s)  +  CO₂(g)

Week 11

A student is having issues with determining the pH at the equivalence point in a titration of a weak acid with a strong base. How would you explain the process of making this determination?

Answer this question and then write an issue that someone would have with the material in Chapter 16 so that the next student can explain that issue.