# Answer to Question #85261 in Other Biology for Michelle Bonilla

Let "a" is concentration of hydrogen ions in solution A, and "b" is concentration of hydrogen ions in solution B.

pH of solution A is log(a), while pH of solution B is log(b).

We know that a/b = 10000

Let's take logarithm of both parts:

log(a/b) = log(10000)

log(a/b) =log(a) - log(b) (it is a known math function), which is the difference in pH we need to identify.

log(a) - log(b) = log(10000)

log(a) - log(b) = 4

So, pH of solution A is 4 units greater than pH of solution B.

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