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Algebra

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Moderate

Applications of Exponents - pH of Solution

ALGEBR-LGKCOD

The pH of a solution is defined as $-log$ (concentration of hydronium ions in units of moles/liter). If a sample of orange juice is determined to have a pH of 3.9, what is the concentration of hydronium ions in units of moles/liter?

A

$1.26 \times 10^{-4}$

B

$2.56 \times 10^{-3}$

C

$3.9 \times 10^{-4}$

D

$8.98 \times 10^{-2}$