ATAR Notes: Forum
QCE Stuff => QCE Science Subjects => QCE Subjects + Help => QCE Chemistry => Topic started by: matthew hay on July 22, 2020, 11:22:59 am
-
Hi all,
Does anyone have any good (in terms of possible good analysis of data) experiment for the student experiment? I've been thinking for a while now, and can't figure any good ones. I'm looking for a modified experiment that is rich in quantitative data for analysis. Our topics and practicals were the:
1. Acid-base titration to calculate the concentration of a solution with reference to a standard solution (mandatory practical).
2. Single displacement reaction in aqueous solutions (mandatory practical).
3. Constructing a galvanic cell using two metal/metal-ion half cells (mandatory practical)
Open to any and all suggestions! :)
-
If you want more quantitative data here are some ideas:
- titration also using a pH meter rather than just an indicator
- trying to construct an electrochemical series based on a series of galvanic cells where you measure cell potential for each
- measuring how the cell potential changes as you vary a factor (e.g. concentration, temperature)
I hope this helps you with ideas for having more quantitative data :)
Make sure you don't overcomplicate things as that will make things more difficult later on - a simple experiment can still lead to great analysis.
-
Thanks, @Bri MT for your response! :)
-
Hey Bri, i was wondering if your had any other modifications in mind for the Construction a galvanic cell using two metal/metal ion half cells practical...
-
Regarding the modification above for the constructing a voltaic prac, what would i be discussing if i change a factor such as concentration or temperature. I was a bit confused about that.
-
Regarding the modification above for the constructing a voltaic prac, what would i be discussing if i change a factor such as concentration or temperature. I was a bit confused about that.
Hi!
You'd want to look at how this is a variation from SLC & therefore the standard potential provided in the electrochemical series may not hold true.
You would likely be interested in seeing if there was a trend, so you'd look at the theory and your results and then consider:
- are my results reliable? accurate? precise? valid? why do you think that? what does this mean for interpreting them?
- what might have impacted my results?
- what are the implications?
^ just like with other experiments
Let me know if you have follow up questions :)
There was also a small conversation here that you might also find relevant.