"Imagine a seesaw or teeter totter with hydronium ion concentration at one end and hydroxide ion concentration located at the other end. As the seesaw operates, it will show the required inverse relationship between these factors…. as the hydronium ion concentration goes up, the hydroxide ion concentration goes down, and vice versa.
Similarly, a seesaw with pH at one end and hydronium ion concentration at the other, shows the relationship these factors have…. as hydronium ion concentration goes up, the pH goes down, and vice versa."
Previously posted at scienceanalogies.com by retired science teacher Murray Hart – original source: Fortman, John J. Pictorial Analogies X: Solutions of Electrolytes Journal of Chemical Education January 1994, 71(1), 27
[This analogy needs to be interpreted qualitatively.]
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