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1 Answer
- 9 years agoFavorite Answer
14 = pH + pOH (note, your class may have pH and pOH equal something slightly smaller than 14, such as 13.9965)
Rearrange to solve for pH
pH = 14 - pOH = 14 - 4.38 = 9.62 = pH
H+ = H3O+
[H3O+] = 10^-pH = 10^-9.62 = 2.4 x 10^-10
Note - significant figures come into play with pH due to the use of logarithms. A pOH of 4.38, has two significant figures (2 figures after the decimal), therefore your answer should only have 2 significant figures.
