A sample of gastric juice has a pH of 1.20.What is the concentration of hydroxide in this sample? A) 1.6 × 10^-13 M B) 6.3 × 10^-2 M C) 1.0 × 10^-7 M D) 6.3 × 10¹² M E) 6.3 × 10^-16 M

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Quizplus · Accepted Answer

The concentration of hydroxide ions ($OH^-$) in a solution can be found using the relationship between the pH and pOH values, where $pH + pOH = 14$. Given a pH of 1.20, the pOH is $14 - 1.20 = 12.80$. The concentration of $OH^-$ ions is then found using $10^{-pOH}$, which is $10^{-12.80} = 1.6 \times 10^{-13} M$.

A Sample of Gastric Juice Has a PH of 1