Asked by Freya

The pH of black coffee is 5.1. What is the pH of a substance that is 40 times less acidic than black coffee? Round your answer to 2 decimal places.
Answered by R_scott
pH is the negative log of the hydrogen ion concentration

less acidic means higher pH

5.1 + log(40) = ?
Answered by Connor
I was taught the formula pH = -log[H+]. Isn't H+ the hydronium ion concentration? So why do we replace it with 40? I wasn't told what the argument for the log is
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