Chemistry HL IA

[EmotionalEwok]

For my IA, I'm going to compare the effectiveness of 5 brands of antacid in curing an acidic stomach 

 

I'm getting conflicting opinions about the topic. My teacher says it sounds okay, but everyone else is saying its not rigorous enough for HL (which I'm really worried about). Do you guys think it sounds okay, and if its not is there any way I could alter the same experiment to make it complex enough(like by fitting some HL topics into it, like pH curves or buffers)?

 

Thanks a lot!

Edited December 28, 2015 by EmotionalEwok

[bguloglu]

Well maybe you could add calculations of buffer strength, that is, the number of moles of hydrogen ions you need to add to change the pH by one unit. This is given by

 

β=number of moles of H⁺ added/change in pH units

 

You could also look at the common ions effect, and how the presence of other electrolytes in stomach secretions, for example Cl^- ions affect the buffer efficiency. This is called the strong ion difference.

[EmotionalEwok]

Well maybe you could add calculations of buffer strength, that is, the number of moles of hydrogen ions you need to add to change the pH by one unit. This is given by

 

β=number of moles of H⁺ added/change in pH units

 

You could also look at the common ions effect, and how the presence of other electrolytes in stomach secretions, for example Cl^- ions affect the buffer efficiency. This is called the strong ion difference.

Hey. Thanks a lot for the help. But my teacher suddenly changed her mind and said that I shouldn't compare brands cause that makes a bad IA. But I don't really want to do something outside of buffers. I was planning on trying something about gastric electrolytes (strong ion difference like you said), and maybe dependence of the buffer on temperature and dilution.

Any other suggestions?