MadSci Network: Chemistry
Query:

Subject: Does the pH level of a fruit affect the voltage it can generate?

Date: Fri Nov 4 20:09:17 2005
Posted by No name entered.
Grade level: 7-9 School: No school entered.
City: No city entered. State/Province: Illinois Country: No country entered.
Area of science: Chemistry
ID: 1131160157.Ch
Message:

My seventh grade son is in the process of completing his science fair project 
and is in need of a professional explanation. His hypothesis was that the more 
acidic (ie, lower pH) a specific fruit or vegetable was, the more voltage 
that "fruit" battery would produce. He tested 11 fruits & vegetables and got 
the following results (fruit/pH/mV): lemon/2.22/997; grapefruit/2.95/923; 
pineapple/3.08/997; kiwi/3.45/663; pear/3.74/770; apple/3.80/1038; 
onion/4.04/741; tomato/4.15/955; peach/4.42/909; banana/4.82/892; and 
cantaloupe/6.24/873. As you can see by his results, there does not appear to be 
a clear predictable pattern. Was his hypothesis incorrect. Please help.


Re: Does the pH level of a fruit affect the voltage it can generate?

Current Queue | Current Queue for Chemistry | Chemistry archives

Try the links in the MadSci Library for more information on Chemistry.



MadSci Home | Information | Search | Random Knowledge Generator | MadSci Archives | Mad Library | MAD Labs | MAD FAQs | Ask a ? | Join Us! | Help Support MadSci


MadSci Network, webadmin@madsci.org
© 1995-2005. All rights reserved.