12. Advanced Topics in Equilibrium
General Approach to Acid-Base Systems
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Determine the pH of a 6.7 x 10 -8 M NaOH.
A
7.17
B
7.14
C
6.82
D
7.57
Verified step by step guidance1
Identify that NaOH is a strong base, which dissociates completely in water to produce OH⁻ ions.
Calculate the concentration of OH⁻ ions, which is equal to the concentration of NaOH, i.e., 6.7 x 10⁻⁸ M.
Use the formula for pOH: \( \text{pOH} = -\log[\text{OH}^-] \) to find the pOH of the solution.
Convert pOH to pH using the relationship: \( \text{pH} = 14 - \text{pOH} \).
Consider the effect of water's autoionization, especially since the concentration of NaOH is very low, and adjust the pH accordingly if necessary.
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