MadSci Network: Chemistry |
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?
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