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What is the pH if the concentration of the conjugate base (A-) is 0.35M and the concentration of the weak acid (HA) is 0.25M

What is the pH if the concentration of the conjugate base (A-) is 0.35M and the concentration of the weak acid (HA) is 0.25M after adding 0.05 M of NaOH ? (pKa 7) A. pH =7.3 B. pH=6.3 C. pH=8.6 D. others

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